{"id":4422,"date":"2026-02-23T15:38:04","date_gmt":"2026-02-23T07:38:04","guid":{"rendered":"https:\/\/www.pgeneral.com\/?p=4422"},"modified":"2026-03-06T18:30:57","modified_gmt":"2026-03-06T10:30:57","slug":"why-gas-chromatography-demands-a-closer-look-at-gcxgc-techniques","status":"publish","type":"post","link":"https:\/\/www.pgeneral.com\/vi\/news\/why-gas-chromatography-demands-a-closer-look-at-gcxgc-techniques\/","title":{"rendered":"T\u1ea1i sao nhi\u1ec5m s\u1eafc kh\u00ed \u0111\u00f2i h\u1ecfi m\u1ed9t c\u00e1i nh\u00ecn g\u1ea7n h\u01a1n v\u1ec1 c\u00e1c k\u1ef9 thu\u1eadt GC \u00d7 GC"},"content":{"rendered":"

\"T\u1ea1i<\/p>\n

Nhi\u1ec7t s\u1eafc kh\u00ed truy\u1ec1n th\u1ed1ng (GC) t\u1eeb l\u00e2u \u0111\u00e3 l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p quan tr\u1ecdng \u0111\u1ec3 t\u00e1ch c\u00e1c h\u1ee3p ch\u1ea5t bay h\u01a1i. Nhi\u1ec7t s\u1eafc kh\u00ed (GC) l\u00e0 m\u1ed9t c\u00e1ch \u0111\u1ec3 t\u00e1ch c\u00e1c ph\u1ea7n c\u1ee7a h\u1ed7n h\u1ee3p, cho ph\u00e9p m\u1ed7i ph\u1ea7n \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n v\u00e0 \u0111o l\u01b0\u1eddng. Tuy nhi\u00ean, nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a n\u00f3 xu\u1ea5t hi\u1ec7n r\u00f5 r\u00e0ng khi x\u1eed l\u00fd c\u00e1c thi\u1ebft l\u1eadp m\u1eabu kh\u00f3 kh\u0103n. GC m\u1ed9t chi\u1ec1u th\u01b0\u1eddng d\u1ef1a v\u00e0o ch\u1ec9 m\u1ed9t c\u1ed9t v\u1edbi m\u1ed9t giai \u0111o\u1ea1n t\u0129nh \u0111\u1ecbnh nh\u1ea5t \u0111\u1ecbnh, v\u00e0 thi\u1ebft l\u1eadp \u0111\u00f3 gi\u1edbi h\u1ea1n n\u00f3 c\u00f3 th\u1ec3 x\u1eed l\u00fd c\u00e1c h\u1ee3p ch\u1ea5t tr\u00f4ng gi\u1ed1ng nhau v\u1ec1 c\u1ea5u tr\u00fac. S\u1ef1 ph\u00e2n t\u00e1ch th\u1ea5p nh\u01b0 v\u1eady d\u1eabn \u0111\u1ebfn c\u00f4ng su\u1ea5t \u0111\u1ec9nh y\u1ebfu, \u0111i\u1ec1u n\u00e0y x\u1ea3y ra r\u1ea5t nhi\u1ec1u v\u1edbi c\u00e1c m\u1eabu ch\u1ee9a h\u00e0ng tr\u0103m ho\u1eb7c h\u00e0ng ng\u00e0n ch\u1ea5t.<\/p>\n

V\u1ea5n \u0111\u1ec1 l\u1edbn nh\u1ea5t trong GC th\u00f4ng th\u01b0\u1eddng l\u00e0 khi c\u00e1c h\u1ee3p ch\u1ea5t xu\u1ea5t hi\u1ec7n c\u00f9ng nhau. M\u1ed9t s\u1ed1 ch\u1ea5t c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i c\u00f9ng m\u1ed9t l\u00fac, \u0111i\u1ec1u n\u00e0y l\u00e0m cho vi\u1ec7c ph\u00e1t hi\u1ec7n ra nh\u1eefng g\u00ec ch\u00fang kh\u00f4ng r\u00f5 r\u00e0ng, v\u00e0 n\u00f3 c\u0169ng l\u00e0m cho l\u01b0\u1ee3ng \u0111o kh\u00f4ng \u0111\u00e1ng tin c\u1eady. N\u1ebfu t\u1ea5t c\u1ea3 ho\u1eb7c m\u1ed9t ph\u1ea7n c\u1ee7a m\u1eabu’ c\u00e1c b\u1ed9 ph\u1eadn chuy\u1ec3n th\u00e0nh kh\u00ed \u1edf kho\u1ea3ng 400 \u00b0 C ho\u1eb7c \u00edt h\u01a1n, v\u00e0 ch\u00fang kh\u00f4ng’ t ph\u00e1 v\u1ee1 \u1edf nhi\u1ec7t \u0111\u1ed9 \u0111\u00f3, h\u1ee3p ch\u1ea5t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ki\u1ec3m tra b\u1eb1ng m\u00e1y nhi\u1ec5m s\u1eafc kh\u00ed. Tuy nhi\u00ean, n\u1ebfu kh\u00f4ng c\u00f3 s\u1ef1 t\u00e1ch bi\u1ec7t \u0111\u1ee7 t\u1ed1t, ph\u00e2n t\u00edch th\u1ef1c s\u1ef1 s\u1ebd b\u1ecb t\u1ed5n h\u1ea1i.<\/p>\n

\u0110i\u1ec1u g\u00ec l\u00e0m cho ma tr\u1eadn ph\u1ee9c t\u1ea1p tr\u1edf n\u00ean th\u00e1ch th\u1ee9c?<\/b><\/strong><\/h3>\n

C\u00e1c m\u1eabu t\u1eeb m\u00f4i tr\u01b0\u1eddng, c\u00e1c s\u1ea3n ph\u1ea9m d\u1ef1a tr\u00ean d\u1ea7u, v\u00e0 c\u00e1c m\u00f4 s\u1ed1ng k\u00e9o cho th\u1ea5y m\u1ed9t s\u1ef1 \u0111a d\u1ea1ng l\u1edbn trong h\u00f3a ch\u1ea5t v\u00e0 r\u1ea5t nhi\u1ec1u trong s\u1ed1 ch\u00fang. Trong c\u00e1c thi\u1ebft l\u1eadp n\u00e0y, c\u00e1c m\u1ee5c ti\u00eau ch\u00ednh \u1edf m\u1ee9c r\u1ea5t th\u1ea5p, v\u00e0 ch\u00fang b\u1ecb \u1ea9n b\u1edfi ti\u1ebfng \u1ed3n n\u1ec1n m\u1ea1nh m\u1ebd. Tr\u1ed9n’ \u0111\u1ed9 b\u1ec1n c\u1ee7a S \u0111\u00f2i h\u1ecfi m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p t\u00e1ch l\u00e0m t\u0103ng \u0111\u1ed9 r\u00f5 r\u00e0ng \u0111\u1ec9nh cao r\u1ea5t nhi\u1ec1u. N\u00f3 c\u0169ng c\u1ea7n n\u00e2ng m\u1ee9c t\u00edn hi\u1ec7u \u0111\u1ebfn ti\u1ebfng \u1ed3n.<\/p>\n

Th\u1eadt kh\u00f4ng may, c\u00e1c thi\u1ebft l\u1eadp GC c\u01a1 b\u1ea3n kh\u00f4ng’ t c\u00f3 kh\u1ea3 n\u0103ng ph\u00e1 v\u1ee1 c\u00e1c h\u1ed7n h\u1ee3p \u0111a m\u1eb7t n\u00e0y. Kho\u1ea3ng c\u00e1ch n\u00e0y \u0111\u00f2i h\u1ecfi c\u00e1c c\u00e1ch ti\u1ebfp c\u1eadn t\u00e1ch bi\u1ec7t t\u1ed1t h\u01a1n. M\u1ed9t l\u1ef1a ch\u1ecdn m\u1ea1nh m\u1ebd l\u00e0 nhi\u1ec5m s\u1eafc kh\u00ed hai chi\u1ec1u to\u00e0n di\u1ec7n (GC \u00d7 GC). N\u00f3 \u0111\u00e1nh b\u1ea1i gi\u1edbi h\u1ea1n t\u00edch h\u1ee3p c\u1ee7a c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ti\u00eau chu\u1ea9n.<\/p>\n

GC hai chi\u1ec1u to\u00e0n di\u1ec7n ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/b><\/strong><\/h2>\n

GC \u00d7 GC \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng tr\u00ean GC ti\u00eau chu\u1ea9n, k\u1ebft n\u1ed1i hai c\u1ed9t v\u1edbi c\u00e1c giai \u0111o\u1ea1n t\u0129nh kh\u00e1c nhau, th\u01b0\u1eddng l\u00e0 m\u1ed9t kh\u00f4ng c\u1ef1c v\u00e0 m\u1ed9t c\u1ef1c. Thi\u1ebft l\u1eadp n\u00e0y cung c\u1ea5p c\u00e1c c\u00e1ch t\u00e1ch qua nhau. C\u00e1c h\u1ee3p ch\u1ea5t \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp tr\u01b0\u1edbc b\u1eb1ng c\u00e1ch ch\u00fang d\u1ec5 bay h\u01a1i. Sau \u0111\u00f3, ch\u00fang t\u00e1ch nhau b\u1eb1ng c\u1ef1c \u0111\u1ed9 ho\u1eb7c c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m kh\u00e1c.<\/p>\n

M\u1ed9t b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh n\u1eb1m gi\u1eefa hai c\u1ed9t, v\u00e0 n\u00f3 c\u1eaft \u0111\u1ea7u ra t\u1eeb c\u1ed9t \u0111\u1ea7u ti\u00ean th\u00e0nh b\u0103ng t\u1ea7n m\u1ecfng. Sau \u0111\u00f3, n\u00f3 \u0111\u01b0a ch\u00fang tr\u1edf l\u1ea1i v\u00e0o th\u1ee9 hai, v\u00e0 h\u00e0nh \u0111\u1ed9ng c\u1eaft n\u00e0y t\u1ea1o ra c\u00e1c s\u1eafc t\u1ed1 c\u00f3 t\u1ed5 ch\u1ee9c. C\u00f4ng su\u1ea5t \u0111\u1ec9nh cao v\u00e0 \u0111\u1ed9 r\u00f5 r\u00e0ng nh\u1ea3y l\u00ean nh\u01b0 m\u1ed9t k\u1ebft qu\u1ea3.<\/p>\n

Nh\u1eefng th\u00e0nh ph\u1ea7n n\u00e0o \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u trong m\u1ed9t h\u1ec7 th\u1ed1ng GC \u00d7 GC?<\/b><\/strong><\/h3>\n

M\u1ed9t thi\u1ebft l\u1eadp GC \u00d7 GC ph\u1ed5 bi\u1ebfn bao g\u1ed3m m\u1ed9t s\u1ed1 ph\u1ea7n ch\u00ednh. \u0110\u00e2y l\u00e0 m\u1ed9t s\u1ef1 s\u1eafp x\u1ebfp hai c\u1ed9t, m\u1ed9t b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t ho\u1eb7c d\u00f2ng ch\u1ea3y, v\u00e0 m\u1ed9t m\u00e1y d\u00f2 nhanh nh\u01b0 m\u1ed9t m\u00e1y d\u00f2 ion h\u00f3a ng\u1ecdn l\u1eeda (FID) ho\u1eb7c quang ph\u1ed5 kh\u1ed1i l\u01b0\u1ee3ng (MS). M\u1ed9t m\u00e1y nhi\u1ec5m s\u1eafc kh\u00ed c\u00f3 m\u1ed9t ngu\u1ed3n cung c\u1ea5p kh\u00ed mang \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t v\u00e0 s\u1ea1ch, m\u1ed9t \u0111\u1ea7u v\u00e0o, m\u1ed9t c\u1ed9t, m\u1ed9t m\u00e1y d\u00f2 v\u00e0 ph\u1ea7n m\u1ec1m \u0111\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u.<\/p>\n

\u0110\u1ec3 x\u1eed l\u00fd c\u00e1c thay \u0111\u1ed5i \u0111\u1ec9nh cao nhanh ch\u00f3ng v\u00e0 thu th\u1eadp d\u1eef li\u1ec7u nhanh ch\u00f3ng, h\u1ec7 th\u1ed1ng c\u1ea7n ph\u1ea7n m\u1ec1m m\u1ea1nh m\u1ebd. Ph\u1ea7n m\u1ec1m n\u00e0y x\u1eed l\u00fd c\u00e1c b\u1ed9 d\u1eef li\u1ec7u l\u1edbn, v\u00e0 n\u00f3 c\u0169ng t\u1ea1o ra c\u00e1c b\u1ea3n \u0111\u1ed3 \u0111\u01b0\u1eddng vi\u1ec1n hai chi\u1ec1u. C\u00e1c c\u00f4ng c\u1ee5 n\u00e0y gi\u00fap b\u1ea1n nh\u00ecn r\u00f5 d\u1eef li\u1ec7u. H\u1ecd c\u0169ng h\u1ed7 tr\u1ee3 trong ph\u00e2n chia \u0111\u1ec9nh t\u1ef1 \u0111\u1ed9ng v\u00e0 c\u00e1c m\u00f4 h\u00ecnh ph\u00e1t hi\u1ec7n.<\/p>\n

\u0110i\u1ec1u g\u00ec l\u00e0m cho GC \u00d7 GC cao h\u01a1n GC th\u00f4ng th\u01b0\u1eddng?<\/b><\/strong><\/h2>\n

GC \u00d7 GC tr\u1ed9n c\u00e1c s\u1ef1 t\u00e1ch l\u00e0m vi\u1ec7c \u1edf g\u00f3c th\u1eb3ng v\u1edbi nhau, l\u00e0m t\u0103ng c\u00f4ng su\u1ea5t \u0111\u1ec9nh b\u1eb1ng m\u1ed9t l\u01b0\u1ee3ng l\u1edbn so v\u1edbi GC m\u1ed9t chi\u1ec1u. C\u00e1c nh\u00e0 ph\u00e2n t\u00edch b\u00e2y gi\u1edd c\u00f3 th\u1ec3 t\u00e1ch ra c\u00e1c h\u1ee3p ch\u1ea5t tr\u1ed1n tho\u00e1t c\u00f9ng nhau. Nh\u1eefng th\u1ee9 n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c tr\u1ed9n tr\u1ed9n trong c\u00e1c thi\u1ebft l\u1eadp th\u01b0\u1eddng xuy\u00ean, v\u00e0 n\u00f3 ch\u1ee9ng minh r\u1ea5t h\u1eefu \u00edch trong h\u1ed7n h\u1ee3p kh\u00f3 kh\u0103n n\u01a1i nhi\u1ec1u ch\u1ea5t c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc g\u1ea7n g\u0169i.<\/p>\n

T\u1ea1i sao \u0111\u1ed9 nh\u1ea1y c\u1ea3m t\u1ed1t h\u01a1n trong GC \u00d7 GC?<\/b><\/strong><\/h3>\n

Trong qu\u00e1 tr\u00ecnh \u0111i\u1ec1u ch\u1ec9nh, c\u00e1c b\u0103ng th\u00f4ng ch\u1ea5t \u0111\u01b0\u1ee3c t\u1eadp trung ch\u1eb7t ch\u1ebd tr\u01b0\u1edbc khi \u0111i v\u00e0o c\u1ed9t th\u1ee9 hai. B\u01b0\u1edbc thu th\u1eadp n\u00e0y l\u00e0m cho c\u00e1c \u0111\u1ec9nh s\u1eafc n\u00e9t h\u01a1n, n\u00f3 c\u0169ng t\u0103ng c\u01b0\u1eddng nh\u1eefng g\u00ec m\u00e1y d\u00f2 nh\u1eadn \u0111\u01b0\u1ee3c. V\u00ec v\u1eady, c\u00e1c l\u01b0\u1ee3ng nh\u1ecf c\u00f3 th\u1ec3 \u1ea9n trong ti\u1ebfng \u1ed3n trong 1D-GC b\u00e2y gi\u1edd tr\u1edf n\u00ean c\u00f3 th\u1ec3 \u0111o \u0111\u01b0\u1ee3c. Th\u00eam v\u00e0o \u0111\u00f3, ti\u1ebfng \u1ed3n c\u01a1 b\u1ea3n gi\u1ea3m r\u1ea5t nhi\u1ec1u, v\u00e0 \u0111i\u1ec1u \u0111\u00f3 n\u00e2ng t\u1ef7 l\u1ec7 t\u00edn hi\u1ec7u-ti\u1ebfng \u1ed3n th\u1eadm ch\u00ed c\u00f2n nhi\u1ec1u h\u01a1n.<\/p>\n

H\u01a1n n\u1eefa, c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh ho\u1ea1t \u0111\u1ed9ng \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c ch\u1ea5t ph\u00e2n t\u00edch v\u1eabn t\u1eadp trung, d\u1eabn \u0111\u1ebfn c\u00e1c t\u00edn hi\u1ec7u s\u1ea1ch h\u01a1n n\u00f3i chung. Trong th\u1ef1c t\u1ebf, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u th\u1ea5y r\u1eb1ng gi\u1edbi h\u1ea1n ph\u00e1t hi\u1ec7n c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3. H\u1ecd c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m \u1edf m\u1ee9c ph\u1ea7n tr\u00ean t\u1ef7 m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng. Nh\u1eefng l\u1ee3i \u00edch nh\u01b0 v\u1eady l\u00e0m cho GC \u00d7 GC tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng vi\u1ec7c c\u00f3 n\u1ed3ng \u0111\u1ed9 th\u1ea5p.<\/p>\n

Chromatograms c\u00f3 c\u1ea5u tr\u00fac \u0111\u01a1n gi\u1ea3n h\u00f3a gi\u1ea3i th\u00edch nh\u01b0 th\u1ebf n\u00e0o?<\/b><\/strong><\/h3>\n

GC m\u1ed9t chi\u1ec1u hi\u1ec3n th\u1ecb c\u00e1c m\u00f4 h\u00ecnh ng\u1eabu nhi\u00ean trong s\u1ef1 elution. Nh\u01b0ng GC\u00d7GC t\u1ea1o ra c\u00e1c s\u1eafc t\u1ed1 c\u00f3 t\u1ed5 ch\u1ee9c. Trong s\u1ed1 n\u00e0y, c\u00e1c nh\u00f3m h\u1ee3p ch\u1ea5t h\u00ecnh th\u00e0nh c\u00e1c b\u0103ng th\u00f4ng r\u00f5 r\u00e0ng d\u1ef1a tr\u00ean th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a ch\u00fang. Thi\u1ebft l\u1eadp n\u00e0y cho ph\u00e9p ph\u00e2n lo\u1ea1i tr\u1ef1c quan nhanh ch\u00f3ng, v\u00e0 n\u00f3 c\u0169ng gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c ch\u1ea5t b\u1eb1ng c\u00e1ch ph\u00f9 h\u1ee3p v\u1edbi th\u1eddi gian gi\u1eef t\u1eeb c\u1ea3 hai chi\u1ec1u.<\/p>\n

H\u01a1n n\u1eefa, c\u00e1c m\u1eabu n\u00e0y l\u00e0m cho vi\u1ec7c nh\u00f3m c\u00e1c m\u1ee5c t\u01b0\u01a1ng t\u1ef1 d\u1ec5 d\u00e0ng h\u01a1n. V\u00ed d\u1ee5, hydrocarbon c\u00f3 th\u1ec3 t\u1eadp h\u1ee3p trong m\u1ed9t khu v\u1ef1c, v\u00e0 h\u1ed7 tr\u1ee3 th\u1ecb gi\u00e1c n\u00e0y t\u0103ng t\u1ed1c to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch. C\u00e1c nh\u00e0 ph\u00e2n t\u00edch d\u00e0nh \u00edt th\u1eddi gian \u0111\u1ec3 b\u1ed1i r\u1ed1i v\u1ec1 s\u1ef1 ch\u1ed3ng ch\u00e9o. Thay v\u00e0o \u0111\u00f3, h\u1ecd t\u1eadp trung v\u00e0o nh\u1eefng ph\u00e1t hi\u1ec7n quan tr\u1ecdng ngay l\u1eadp t\u1ee9c.<\/p>\n

GC\u00d7GC cung c\u1ea5p gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t \u1edf \u0111\u00e2u?<\/b><\/strong><\/h2>\n

C\u00e1c m\u1eabu t\u1eeb d\u1ea7u m\u1ecf ch\u1ee9a h\u00e0ng ng\u00e0n hydrocarbon. Ch\u00fang th\u01b0\u1eddng ch\u1ec9 kh\u00e1c nhau m\u1ed9t ch\u00fat trong vi\u1ec7c x\u00e2y d\u1ef1ng. GC \u00d7 GC cung c\u1ea5p s\u1ef1 t\u00e1ch s\u1eafc n\u00e9t cho c\u00e1c b\u1ed9 ph\u1eadn nh\u01b0 v\u1eady, h\u1ed7 tr\u1ee3 l\u1eadp b\u1ea3n \u0111\u1ed3 chi ti\u1ebft, l\u00e0 ch\u00eca kh\u00f3a cho vi\u1ec7c xem c\u00e1c quy tr\u00ecnh, ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng, v\u00e0 th\u1eadm ch\u00ed l\u00e0 c\u00f4ng vi\u1ec7c hi\u1ec7n tr\u01b0\u1eddng t\u1ed9i ph\u1ea1m trong d\u1ea7u.<\/p>\n

Chi ti\u1ebft, k\u1ef9 thu\u1eadt ti\u1ebft l\u1ed9 c\u00e1c \u0111\u1ed3ng v\u1ecb m\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ti\u00eau chu\u1ea9n b\u1ecf l\u1ee1. C\u00e1c nh\u00e0 m\u00e1y tinh ch\u1ebf s\u1eed d\u1ee5ng n\u00f3 \u0111\u1ec3 theo d\u00f5i nh\u1eefng thay \u0111\u1ed5i trong c\u00e1c b\u01b0\u1edbc tinh ch\u1ebf. C\u00e1c nh\u00f3m ch\u1ea5t l\u01b0\u1ee3ng d\u1ef1a v\u00e0o n\u00f3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tinh khi\u1ebft s\u1ea3n ph\u1ea9m. Ngay c\u1ea3 trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p ph\u00e1p l\u00fd, c\u00e1c h\u1ed3 s\u01a1 ch\u00ednh x\u00e1c gi\u00fap theo d\u00f5i ngu\u1ed3n d\u1ea7u m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n

N\u00f3 cung c\u1ea5p nh\u1eefng l\u1ee3i th\u1ebf n\u00e0o trong th\u1eed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng?<\/b><\/strong><\/h3>\n

GC\u00d7GC t\u1ecfa s\u00e1ng trong vi\u1ec7c t\u00ecm c\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m nh\u1ecf. Ch\u00fang bao g\u1ed3m hydrocarbon th\u01a1m \u0111a v\u00f2ng (PAH), biphenyl \u0111a clo (PCB) v\u00e0 thu\u1ed1c tr\u1eeb s\u00e2u. C\u00e1c ch\u1ea5t nh\u01b0 v\u1eady th\u01b0\u1eddng \u1ea9n trong c\u00e1c thi\u1ebft l\u1eadp m\u00f4i tr\u01b0\u1eddng b\u1eadn r\u1ed9n, v\u00e0 s\u1ee9c m\u1ea1nh t\u00e1ch r\u1eddi m\u1ea1nh m\u1ebd c\u1ee7a n\u00f3 \u0111\u1ea3m b\u1ea3o ngay c\u1ea3 c\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m g\u1ea7n ph\u00f9 h\u1ee3p c\u0169ng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n v\u00e0 \u0111\u1ebfm v\u1edbi s\u1ef1 t\u1ef1 tin.<\/p>\n

C\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i r\u1ea5t nhi\u1ec1u t\u1eeb \u0111i\u1ec1u n\u00e0y. Ch\u00fang c\u00f3 th\u1ec3 theo d\u00f5i n\u01b0\u1edbc, \u0111\u1ea5t v\u00e0 kh\u00f4ng kh\u00ed m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady h\u01a1n. C\u00e1c nh\u00e0 qu\u1ea3n l\u00fd s\u1eed d\u1ee5ng d\u1eef li\u1ec7u \u0111\u1ec3 ki\u1ec3m tra tu\u00e2n th\u1ee7. Ph\u01b0\u01a1ng ph\u00e1p’ S\u1ef1 nh\u1ea1y c\u1ea3m c\u1ee7a ch\u00fang t\u00f4i b\u1eaft \u0111\u01b0\u1ee3c c\u00e1c m\u1ed1i \u0111e d\u1ecda s\u1edbm, b\u1ea3o v\u1ec7 h\u1ec7 sinh th\u00e1i v\u00e0 s\u1ee9c kh\u1ecfe c\u00f4ng c\u1ed9ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 c\u1ea3i thi\u1ec7n c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c ph\u1ea9m v\u00e0 n\u01b0\u1edbc hoa?<\/b><\/strong><\/h3>\n

\u0110\u1ed1i v\u1edbi an to\u00e0n th\u1ef1c ph\u1ea9m v\u00e0 m\u00f9i h\u01b0\u01a1ng, nh\u1eefng thay \u0111\u1ed5i nh\u1ecf trong c\u00e1c b\u1ed9 ph\u1eadn d\u1ec5 bay h\u01a1i r\u1ea5t quan tr\u1ecdng. Ch\u00fang \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u01b0\u01a1ng v\u1ecb, m\u00f9i ho\u1eb7c ki\u1ec3m tra an to\u00e0n. GC\u00d7GC ph\u00e1t hi\u1ec7n c\u00e1c chi ti\u1ebft tinh t\u1ebf n\u00e0y t\u1ed1t, v\u00e0 n\u00f3 tr\u1edf n\u00ean c\u1ea7n thi\u1ebft \u0111\u1ec3 nghi\u00ean c\u1ee9u m\u00f9i h\u01b0\u01a1ng, s\u00e0ng l\u1ecdc nh\u1eefng th\u1ee9 x\u1ea5u v\u00e0 b\u1eaft c\u00e1c s\u1ea3n ph\u1ea9m gi\u1ea3 m\u1ea1o. Trong ng\u00e0nh c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m, n\u00f3 gi\u00fap ph\u00e1t hi\u1ec7n c\u00e1c d\u1ea5u hi\u1ec7u h\u01b0 h\u1ecfng nhanh ch\u00f3ng. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t n\u01b0\u1edbc hoa s\u1eed d\u1ee5ng n\u00f3 \u0111\u1ec3 pha tr\u1ed9n ho\u00e0n h\u1ea3o. C\u00e1c nh\u00e2n vi\u00ean an to\u00e0n \u00e1p d\u1ee5ng n\u00f3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 ch\u1ea5t th\u1ea3i c\u00f3 h\u1ea1i t\u1ed3n t\u1ea1i. Nh\u00ecn chung, n\u00f3 n\u00e2ng cao ti\u00eau chu\u1ea9n trong c\u00e1c l\u0129nh v\u1ef1c n\u00e0y th\u00f4ng qua nh\u1eefng hi\u1ec3u bi\u1ebft t\u1ed1t h\u01a1n.<\/p>\n

B\u1ea1n n\u00ean xem x\u00e9t g\u00ec khi t\u00edch h\u1ee3p GC \u00d7 GC v\u00e0o ph\u00f2ng th\u00ed nghi\u1ec7m c\u1ee7a b\u1ea1n?<\/b><\/strong><\/h2>\n

\"nhi\u1ec5m<\/p>\n

 <\/p>\n

Ch\u1ecdn c\u00e1c lo\u1ea1i c\u1ed9t ph\u00f9 h\u1ee3p l\u00e0 r\u1ea5t quan tr\u1ecdng. Chi\u1ec1u th\u1ee9 nh\u1ea5t th\u01b0\u1eddng l\u00e0 m\u1ed9t c\u1ed9t kh\u00f4ng c\u1ef1c. Ph\u1ea7n th\u1ee9 hai s\u1eed d\u1ee5ng m\u1ed9t giai \u0111o\u1ea1n c\u1ef1c cho \u0111a d\u1ea1ng h\u00e0ng \u0111\u1ea7u trong s\u1ef1 t\u00e1ch bi\u1ec7t. Phong c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh n\u00ean ph\u00f9 h\u1ee3p v\u1edbi c\u00f4ng vi\u1ec7c trong tay. B\u1ed9 \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t cung c\u1ea5p k\u1ebft qu\u1ea3 t\u1ed1t h\u01a1n nh\u01b0ng c\u1ea7n qu\u1ea3n l\u00fd nhi\u1ec7t ch\u00ednh x\u00e1c.<\/p>\n

Ch\u1ecdn m\u00e1y d\u00f2 ph\u1ee5 thu\u1ed9c v\u00e0o nh\u1eefng g\u00ec b\u1ea1n mu\u1ed1n \u0111\u1ea1t \u0111\u01b0\u1ee3c. FID cho ph\u00e9p \u0111o th\u1eb3ng tuy\u1ec7t v\u1eddi. MS gi\u00fap x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng c\u00e1c ph\u00e2n t\u1eed. Thi\u1ebft l\u1eadp nh\u01b0 G5 GC<\/b><\/u><\/strong><\/a>\u00a0cho ph\u00e9p x\u00e2y d\u1ef1ng linh ho\u1ea1t, v\u00e0 ch\u00fang ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c nhi\u1ec7m v\u1ee5 GC \u00d7 GC ti\u00ean ti\u1ebfn v\u1edbi \u0111i\u1ec1u khi\u1ec3n n\u0103ng l\u01b0\u1ee3ng th\u00f4ng minh v\u00e0 h\u1ed7 tr\u1ee3 cho nhi\u1ec1u m\u00e1y d\u00f2.<\/p>\n

Ngo\u00e0i ra, h\u00e3y xem x\u00e9t d\u00f2ng ch\u1ea3y t\u1ed5ng th\u1ec3 c\u1ee7a h\u1ec7 th\u1ed1ng. \u0110\u1ea3m b\u1ea3o \u0111\u1ed9 tinh khi\u1ebft kh\u00ed mang \u0111\u1ec3 tr\u00e1nh \u00f4 nhi\u1ec5m. Thi\u1ebft k\u1ebf \u0111\u1ea7u v\u00e0o n\u00ean ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c lo\u1ea1i m\u1eabu, cho d\u00f9 phun ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed, v\u00e0 c\u00e1c l\u1ef1a ch\u1ecdn n\u00e0y x\u00e2y d\u1ef1ng m\u1ed9t thi\u1ebft l\u1eadp ch\u1ea1y tr\u01a1n tru trong c\u00e1c chuy\u1ebfn ch\u1ea1y d\u00e0i.<\/p>\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 qu\u1ea3n l\u00fd d\u1eef li\u1ec7u sau khi mua?<\/b><\/strong><\/h3>\n

GC \u00d7 GC t\u1ea1o ra m\u1ed9t l\u0169 l\u1ee5t d\u1eef li\u1ec7u, \u0111\u00f2i h\u1ecfi ph\u1ea7n m\u1ec1m ti\u00ean ti\u1ebfn \u0111\u1ec3 \u0111\u1ed1i ph\u00f3 v\u1edbi t\u1ed1c \u0111\u1ed9 thu th\u1eadp nhanh ch\u00f3ng v\u00e0 k\u1ebft qu\u1ea3 kh\u00f3 kh\u0103n. C\u00e1c b\u1ea3n \u0111\u1ed3 \u0111\u01b0\u1eddng vi\u1ec1n hai chi\u1ec1u, thu\u1eadt to\u00e1n \u0111\u1ec3 chia \u0111\u1ec9nh cao v\u00e0 pha tr\u1ed9n d\u1ef1a tr\u00ean th\u1ed1ng k\u00ea l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 r\u00fat ra th\u00f4ng tin h\u1eefu \u00edch. Vi\u1ec7c s\u1eafp x\u1ebfp t\u1ef1 \u0111\u1ed9ng th\u00f4ng qua ph\u00e1t hi\u1ec7n m\u1eabu c\u1eaft gi\u1ea3m th\u1eddi gian xem x\u00e9t v\u00e0 c\u0169ng l\u00e0m t\u0103ng ni\u1ec1m tin v\u00e0o k\u1ebft qu\u1ea3.<\/p>\n

Sau khi ch\u1ea1y, c\u00e1c nh\u00f3m th\u01b0\u1eddng xu\u1ea5t d\u1eef li\u1ec7u sang c\u00e1c n\u1ec1n t\u1ea3ng chuy\u00ean d\u1ee5ng. Ch\u00fang x\u1eed l\u00fd h\u00ecnh \u1ea3nh v\u00e0 b\u00e1o c\u00e1o. T\u00edch h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng th\u00f4ng tin ph\u00f2ng th\u00ed nghi\u1ec7m h\u1ee3p l\u00fd h\u00f3a quy tr\u00ecnh l\u00e0m vi\u1ec7c. Trong c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m b\u1eadn r\u1ed9n, thi\u1ebft l\u1eadp n\u00e0y ti\u1ebft ki\u1ec7m gi\u1edd v\u00e0 gi\u1ea3m l\u1ed7i trong b\u00e1o c\u00e1o.<\/p>\n

B\u1ea1n c\u00f3 th\u1ec3 tin t\u01b0\u1edfng ai cho c\u00e1c gi\u1ea3i ph\u00e1p nhi\u1ec5m s\u1eafc \u0111\u00e1ng tin c\u1eady?<\/b><\/strong><\/h2>\n

C\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m t\u00ecm ki\u1ebfm c\u00e1c c\u00f4ng c\u1ee5 h\u00e0ng \u0111\u1ea7u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n cho d\u00f2ng ch\u1ea3y nhi\u1ec5m s\u1eafc kh\u00ed \u0111\u1ea7y \u0111\u1ee7 c\u00f3 th\u1ec3 chuy\u1ec3n sang PERSEE<\/b><\/u><\/strong><\/a>H\u1ecd cung c\u1ea5p c\u00e1c l\u1ef1a ch\u1ecdn v\u1eefng ch\u1eafc d\u1ef1a tr\u00ean nhi\u1ec1u n\u0103m nghi\u00ean c\u1ee9u v\u00e0 \u00fd t\u01b0\u1edfng m\u1edbi. D\u00f2ng thi\u1ebft b\u1ecb nhi\u1ec5m s\u1eafc c\u1ee7a h\u1ecd bao g\u1ed3m. C\u00e1c M7 t\u1ee9 c\u1ef1c \u0111\u01a1n GC-MS<\/b><\/u><\/strong><\/a>, \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng cho c\u1ea3m bi\u1ebfn kh\u1ed1i l\u01b0\u1ee3ng m\u1ea1nh m\u1ebd trong an to\u00e0n th\u1ef1c ph\u1ea9m, theo d\u00f5i m\u00f4i tr\u01b0\u1eddng, khoa h\u1ecdc sinh ho\u1ea1t v\u00e0 c\u00f4ng vi\u1ec7c t\u1ed9i ph\u1ea1m. N\u1ec1n t\u1ea3ng G5 GC \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp \u0111\u1ec3 t\u0103ng tr\u01b0\u1edfng d\u1ec5 d\u00e0ng, bao g\u1ed3m c\u00e1c thi\u1ebft l\u1eadp hai c\u1ed9t cho GC \u00d7 GC. D\u00f2ng T7 c\u00f3 x\u1eed l\u00fd nhi\u1ec7t ch\u00ednh x\u00e1c, r\u1ea5t quan tr\u1ecdng cho vi\u1ec7c ch\u1ea1y b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t.<\/p>\n

B\u1eaft \u0111\u1ea7u v\u00e0o n\u0103m 1991 nh\u01b0 m\u1ed9t c\u00f4ng ty c\u00f4ng ngh\u1ec7 cao m\u1edbi<\/b><\/u><\/strong><\/a>PERSEE k\u1ebft h\u1ee3p c\u00e1c k\u1ef9 n\u0103ng nghi\u00ean c\u1ee9u s\u00e2u s\u1eafc v\u1edbi s\u1ef1 hi\u1ec7n di\u1ec7n tr\u00ean to\u00e0n th\u1ebf gi\u1edbi, v\u00e0 h\u1ecd gi\u00fap c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m ph\u00e2n t\u00edch trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb h\u00f3a ch\u1ea5t d\u1ea7u \u0111\u1ebfn s\u1ea3n xu\u1ea5t thu\u1ed1c, v\u1edbi thi\u1ebft b\u1ecb kh\u00f3 kh\u0103n v\u00e0 s\u1ef1 gi\u00fap \u0111\u1ee1 \u1ed5n \u0111\u1ecbnh. Ngo\u00e0i c\u00e1c s\u1ea3n ph\u1ea9m, PERSEE cung c\u1ea5p c\u00e1c m\u1ea1ng l\u01b0\u1edbi \u0111\u00e0o t\u1ea1o v\u00e0 d\u1ecbch v\u1ee5. H\u1ed7 tr\u1ee3 n\u00e0y \u0111\u1ea3m b\u1ea3o vi\u1ec7c ch\u1ea5p nh\u1eadn tr\u01a1n tru. Ng\u01b0\u1eddi d\u00f9ng khen ng\u1ee3i s\u1ef1 tin c\u1eady trong vi\u1ec7c s\u1eed d\u1ee5ng h\u00e0ng ng\u00e0y. \u0110\u1ed1i v\u1edbi c\u00e1c nh\u00f3m to\u00e0n c\u1ea7u, s\u1ef1 ti\u1ebfp c\u1eadn c\u1ee7a h\u1ecd c\u00f3 ngh\u0129a l\u00e0 c\u00e1c b\u1ed9 ph\u1eadn v\u00e0 l\u1eddi khuy\u00ean nhanh ch\u00f3ng, gi\u1eef cho ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh.<\/p>\n

K\u1ebft lu\u1eadn: N\u00e2ng hi\u1ec7u su\u1ea5t ph\u00e2n t\u00edch th\u00f4ng qua t\u00edch h\u1ee3p GC \u00d7 GC<\/b><\/strong><\/h2>\n

Nhi\u1ec7t s\u1eafc kh\u00ed hai chi\u1ec1u to\u00e0n di\u1ec7n s\u1eeda ch\u1eefa c\u00e1c \u0111i\u1ec3m y\u1ebfu ch\u00ednh c\u1ee7a GC th\u00f4ng th\u01b0\u1eddng, mang l\u1ea1i s\u1ee9c m\u1ea1nh t\u00e1ch c\u1ea5p cao nh\u1ea5t, c\u1ea3m bi\u1ebfn t\u1ed1t h\u01a1n v\u00e0 c\u00e1ch r\u00f5 r\u00e0ng \u0111\u1ec3 \u0111\u1ecdc k\u1ebft qu\u1ea3. Khi c\u00e1c nhi\u1ec7m v\u1ee5 ph\u00e2n t\u00edch kh\u00f3 kh\u0103n ph\u00e1t tri\u1ec3n trong c\u00e1c l\u0129nh v\u1ef1c nh\u01b0 n\u0103ng l\u01b0\u1ee3ng, m\u00f4i tr\u01b0\u1eddng, an to\u00e0n th\u1ef1c ph\u1ea9m v\u00e0 thu\u1ed1c, vi\u1ec7c \u0111\u01b0a GC \u00d7 GC gi\u1eef cho c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m s\u1eb5n s\u00e0ng. Ch\u00fang \u0111\u00e1p \u1ee9ng c\u00e1c \u0111\u00e1nh gi\u00e1 h\u00e0ng \u0111\u1ea7u v\u1ec1 \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed9 ch\u1eafc ch\u1eafn trong vi\u1ec7c x\u1eed l\u00fd c\u00e1c m\u1eabu ph\u1ee9c t\u1ea1p.<\/p>\n

Nh\u00ecn v\u00e0o t\u01b0\u01a1ng lai, c\u00f4ng ngh\u1ec7 n\u00e0y c\u00f3 th\u1ec3 s\u1ebd k\u1ebft h\u1ee3p v\u1edbi c\u00e1c ti\u1ebfn b\u1ed9 kh\u00e1c, ch\u1eb3ng h\u1ea1n nh\u01b0 AI cho khai th\u00e1c d\u1eef li\u1ec7u. C\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m \u00e1p d\u1ee5ng n\u00f3 s\u1edbm c\u00f3 l\u1ee3i trong nghi\u00ean c\u1ee9u v\u00e0 tu\u00e2n th\u1ee7. Cu\u1ed1i c\u00f9ng, n\u00f3 \u0111\u1ea9y c\u00f4ng vi\u1ec7c ph\u00e2n t\u00edch l\u00ean t\u1ea7m cao m\u1edbi, gi\u1ea3i quy\u1ebft c\u00e2u \u0111\u1ed1 th\u1ebf gi\u1edbi th\u1ef1c v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n

C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/b><\/strong><\/h3>\n

Q1: Lo\u1ea1i m\u00e1y d\u00f2 n\u00e0o \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u1edbi GC \u00d7 GC?<\/b><\/strong>
\n<\/b><\/strong>A1: M\u00e1y d\u00f2 ion h\u00f3a ng\u1ecdn l\u1eeda (FID) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1edd \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111o ch\u1ed7 c\u1ee7a ch\u00fang. Ph\u1ed5 ph\u1ed5 kh\u1ed1i l\u01b0\u1ee3ng (MS) th\u01b0\u1eddng k\u1ebft h\u1ee3p v\u1edbi GC \u00d7 GC \u0111\u1ec3 ph\u00e1t hi\u1ec7n h\u1ee3p ch\u1ea5t c\u1ea7n thi\u1ebft.<\/p>\n

Q2: C\u00f3 kh\u00f3 chuy\u1ec3n t\u1eeb GC th\u00f4ng th\u01b0\u1eddng sang GC \u00d7 GC kh\u00f4ng?<\/b><\/strong>
\n<\/b><\/strong>A2: C\u00f3 m\u1ed9t ch\u00fat \u0111\u01b0\u1eddng h\u1ecdc \u0111\u1ec3 thi\u1ebft l\u1eadp thi\u1ebft b\u1ecb v\u00e0 \u0111\u1ecdc d\u1eef li\u1ec7u. Nh\u01b0ng ph\u1ea7n m\u1ec1m hi\u1ec7n t\u1ea1i l\u00e0m cho vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i d\u1ec5 d\u00e0ng h\u01a1n. \u0110\u00e0o t\u1ea1o t\u1eeb c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t nh\u01b0 PERSEE gi\u00fap tr\u01a1n tru vi\u1ec7c tri\u1ec3n khai.<\/p>\n

Q3: M\u00e1y nhi\u1ec5m s\u1eafc kh\u00ed hi\u1ec7n c\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c n\u00e2ng c\u1ea5p \u0111\u1ec3 h\u1ed7 tr\u1ee3 GC \u00d7 GC kh\u00f4ng?<\/b><\/strong>
\n<\/b><\/strong>A3: V\u00e2ng, trong m\u1ed9t s\u1ed1 t\u00ecnh hu\u1ed1ng. Th\u00eam m\u1ed9t b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh v\u00e0 ph\u1ea7n m\u1ec1m ph\u00f9 h\u1ee3p c\u00f3 th\u1ec3 l\u00e0m th\u1ee7 thu\u1eadt. Tuy nhi\u00ean, c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng cho m\u1ee5c \u0111\u00edch nh\u01b0 G5-GC c\u1ee7a PERSEE cung c\u1ea5p c\u00e1c m\u1ed1i quan h\u1ec7 m\u01b0\u1ee3t m\u00e0 h\u01a1n v\u00e0 \u0111\u1ea7u ra t\u1ed1t h\u01a1n.<\/p>\n

 <\/p>","protected":false},"excerpt":{"rendered":"

Traditional gas chromatography (GC) has long been a key method for separating volatile compounds. Gas chromatography (GC) serves as a way to separate\u00a0the parts of a mixture, which\u00a0lets each part be spotted and measured. Yet, its drawbacks show up clearly when handling tough sample setups. One-dimensional GC often relies on just one column with a […]<\/p>\n","protected":false},"author":1,"featured_media":4429,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[38,37],"tags":[],"class_list":["post-4422","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-information","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts\/4422","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/comments?post=4422"}],"version-history":[{"count":3,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts\/4422\/revisions"}],"predecessor-version":[{"id":4455,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts\/4422\/revisions\/4455"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/media\/4429"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/media?parent=4422"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/categories?post=4422"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/tags?post=4422"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}