{"id":3877,"date":"2025-09-04T11:50:38","date_gmt":"2025-09-04T03:50:38","guid":{"rendered":"https:\/\/www.pgeneral.com\/?p=3877"},"modified":"2025-09-03T17:23:10","modified_gmt":"2025-09-03T09:23:10","slug":"what-is-the-difference-between-headspace-and-direct-injection-gc-for-volatile-compound-analysis","status":"publish","type":"post","link":"https:\/\/www.pgeneral.com\/vi\/applications\/what-is-the-difference-between-headspace-and-direct-injection-gc-for-volatile-compound-analysis","title":{"rendered":"S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa Headspace v\u00e0 Direct Injection GC \u0111\u1ec3 ph\u00e2n t\u00edch h\u1ee3p ch\u1ea5t bay h\u01a1i l\u00e0 g\u00ec?"},"content":{"rendered":"

\"1\"<\/p>\n

Nhi\u1ec7t s\u1eafc kh\u00ed, ho\u1eb7c GC, l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn \u0111\u1ec3 t\u00e1ch v\u00e0 t\u00ecm ra c\u00e1c h\u1ee3p ch\u1ea5t bay h\u01a1i trong h\u1ed7n h\u1ee3p ph\u1ee9c t\u1ea1p. N\u00f3 l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 r\u1ea5t quan tr\u1ecdng trong c\u1ea3 ph\u00f2ng th\u00ed nghi\u1ec7m nghi\u00ean c\u1ee9u v\u00e0 nh\u00e0 m\u00e1y. \u0110\u00f3 l\u00e0 b\u1edfi v\u00ec’ ch\u00ednh x\u00e1c, nhanh ch\u00f3ng v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho nhi\u1ec1u th\u1ee9.<\/p>\n

T\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c ph\u00e2n t\u00edch c\u00e1c h\u1ee3p ch\u1ea5t bay h\u01a1i<\/h2>\n

C\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 bay h\u01a1i (VOC) \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong nhi\u1ec1u s\u1ea3n ph\u1ea9m. B\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y ch\u00fang trong thu\u1ed1c, th\u1ef1c ph\u1ea9m, m\u1eabu m\u00f4i tr\u01b0\u1eddng v\u00e0 h\u00f3a d\u1ea7u. Nh\u00ecn v\u00e0o ch\u00fang l\u00e0 r\u1ea5t quan tr\u1ecdng cho ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng, tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh v\u00e0 ki\u1ec3m tra m\u00f4i tr\u01b0\u1eddng. V\u00ed d\u1ee5, VOC c\u00f3 th\u1ec3 thay \u0111\u1ed5i v\u1ecb th\u1ef1c ph\u1ea9m ho\u1eb7c thu\u1ed1c ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u01b0 th\u1ebf n\u00e0o. Ch\u00fang c\u0169ng c\u00f3 th\u1ec3 cho th\u1ea5y n\u1ebfu c\u00f3 \u00f4 nhi\u1ec5m trong kh\u00f4ng kh\u00ed ho\u1eb7c n\u01b0\u1edbc.<\/p>\n

C\u00e1c nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n c\u1ee7a kh\u00ed chromatography<\/h2>\n

V\u1eady chromatography kh\u00ed ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o? Tr\u01b0\u1edbc h\u1ebft, m\u1ed9t m\u1eabu \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0o m\u1ed9t \u0111\u1ea7u v\u00e0o n\u00f3ng, n\u01a1i n\u00f3 bi\u1ebfn th\u00e0nh kh\u00ed. Sau \u0111\u00f3, m\u1ed9t kh\u00ed mang, nh\u01b0 heli ho\u1eb7c nit\u01a1, \u0111\u1ea9y m\u1eabu kh\u00ed qua m\u1ed9t \u1ed1ng d\u00e0i \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u1ed9t nhi\u1ec5m s\u1eafc. C\u1ed9t n\u00e0y \u0111\u01b0\u1ee3c ph\u1ee7 b\u1eb1ng m\u1ed9t giai \u0111o\u1ea1n t\u0129nh. C\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c nhau c\u1ee7a m\u1eabu d\u00ednh v\u00e0o l\u1edbp ph\u1ee7 n\u00e0y trong th\u1eddi gian kh\u00e1c nhau. B\u1edfi v\u00ec \u0111i\u1ec1u n\u00e0y, h\u1ecd xu\u1ea5t hi\u1ec7n \u1edf c\u00e1c th\u1eddi \u0111i\u1ec3m kh\u00e1c nhau. Cu\u1ed1i c\u00f9ng, c\u00e1c m\u00e1y d\u00f2 nh\u01b0 m\u00e1y d\u00f2 ion h\u00f3a ng\u1ecdn l\u1eeda (FID) ho\u1eb7c m\u00e1y ph\u1ed5 \u0111o kh\u1ed1i l\u01b0\u1ee3ng (MS) ph\u00e1t hi\u1ec7n ch\u00fang.<\/p>\n

C\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn trong ng\u00e0nh c\u00f4ng nghi\u1ec7p v\u00e0 nghi\u00ean c\u1ee9u<\/h2>\n

GC \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u l\u0129nh v\u1ef1c. C\u00e1c nh\u00e0 khoa h\u1ecdc ph\u00e1p y s\u1eed d\u1ee5ng n\u00f3 \u0111\u1ec3 ki\u1ec3m tra ma t\u00fay. C\u00e1c nh\u00e0 khoa h\u1ecdc m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng n\u00f3 \u0111\u1ec3 t\u00ecm c\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m. Trong ng\u00e0nh c\u00f4ng nghi\u1ec7p d\u01b0\u1ee3c ph\u1ea9m, n\u00f3’ s \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra dung m\u00f4i c\u00f2n l\u1ea1i. N\u00f3 c\u0169ng h\u1eefu \u00edch cho vi\u1ec7c l\u00e0m n\u01b0\u1edbc hoa v\u00e0 trong tinh ch\u1ebf d\u1ea7u.<\/p>\n

Ti\u00eam tr\u1ef1c ti\u1ebfp trong nhi\u1ec5m s\u1eafc kh\u00ed<\/h3>\n

Ti\u00eam tr\u1ef1c ti\u1ebfp l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u1ec3 l\u1ea5y m\u1eabu v\u00e0o m\u00e1y GC.<\/p>\n

L\u00e0m th\u1ebf n\u00e0o ti\u00eam tr\u1ef1c ti\u1ebfp ho\u1ea1t \u0111\u1ed9ng<\/h2>\n

V\u1edbi ti\u00eam tr\u1ef1c ti\u1ebfp, m\u1ed9t \u1ed1ng ti\u00eam nh\u1ecf \u0111\u01b0a m\u1eabu ch\u1ea5t l\u1ecfng v\u00e0o \u0111\u1ea7u v\u00e0o GC. L\u1ed1i v\u00e0o r\u1ea5t n\u00f3ng. Nhi\u1ec7t n\u00e0y nhanh ch\u00f3ng bi\u1ebfn m\u1eabu th\u00e0nh kh\u00ed. Sau \u0111\u00f3, kh\u00ed mang mang n\u00f3 v\u00e0o c\u1ed9t.<\/p>\n

L\u1ee3i th\u1ebf c\u1ee7a ti\u00eam tr\u1ef1c ti\u1ebfp<\/h2>\n

Ti\u00eam tr\u1ef1c ti\u1ebfp c\u00f3 m\u1ed9t s\u1ed1 \u0111i\u1ec3m m\u1ea1nh l\u00e0m cho n\u00f3 tuy\u1ec7t v\u1eddi cho nhi\u1ec1u x\u00e9t nghi\u1ec7m th\u01b0\u1eddng xuy\u00ean.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y kh\u00f4ng’ t c\u1ea7n r\u1ea5t nhi\u1ec1u x\u1eed l\u00fd m\u1eabu. R\u1ea5t nhi\u1ec1u th\u1eddi gian, b\u1ea1n don’ t c\u1ea7n chu\u1ea9n b\u1ecb m\u1eabu \u1edf t\u1ea5t c\u1ea3. \u0110i\u1ec1u n\u00e0y l\u00e0m cho ph\u01b0\u01a1ng ph\u00e1p nhanh h\u01a1n v\u00e0 \u0111\u01a1n gi\u1ea3n h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i ph\u00e2n t\u00edch kh\u00e1c.<\/p>\n

B\u1edfi v\u00ec c\u00e1c m\u1eabu \u0111i th\u1eb3ng v\u00e0o m\u00e1y m\u00e0 kh\u00f4ng c\u1ea7n b\u01b0\u1edbc b\u1ed5 sung, b\u1ea1n c\u00f3 th\u1ec3 v\u01b0\u1ee3t qua ch\u00fang nhanh h\u01a1n. \u0110i\u1ec1u n\u00e0y l\u00e0 ho\u00e0n h\u1ea3o cho c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m c\u00f3 r\u1ea5t nhi\u1ec1u m\u1eabu \u0111\u1ec3 ki\u1ec3m tra.<\/p>\n

H\u1ea1n ch\u1ebf v\u00e0 th\u00e1ch th\u1ee9c<\/h2>\n

Ngay c\u1ea3 v\u1edbi l\u1ee3i \u00edch c\u1ee7a n\u00f3, ti\u00eam tr\u1ef1c ti\u1ebfp c\u00f3 m\u1ed9t s\u1ed1 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ea7n suy ngh\u0129.<\/p>\n

\u0110\u00f4i khi, nh\u1eefng th\u1ee9 trong m\u1eabu don’ t bi\u1ebfn th\u00e0nh kh\u00ed. Nh\u1eefng bit kh\u00f4ng bay h\u01a1i n\u00e0y c\u00f3 th\u1ec3 t\u00edch t\u1ee5 v\u00e0 l\u00e0m cho m\u00e1y b\u1ea9n theo th\u1eddi gian. \u0110i\u1ec1u g\u00ec’ H\u01a1n n\u1eefa, v\u1ea5n \u0111\u1ec1 n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra v\u1ea5n \u0111\u1ec1 v\u1edbi c\u00e1c x\u00e9t nghi\u1ec7m sau n\u00e0y ho\u1eb7c l\u00e0m cho k\u1ebft qu\u1ea3 t\u1ed3i t\u1ec7 h\u01a1n.<\/p>\n

B\u1ea1n c\u00f3 th\u1ec3 ph\u1ea3i l\u00e0m s\u1ea1ch ho\u1eb7c thay \u0111\u1ed5i c\u00e1c b\u1ed9 ph\u1eadn nh\u01b0 l\u1edbp l\u00f3t \u0111\u1ea7u v\u00e0o v\u00e0 c\u1ed9t th\u01b0\u1eddng xuy\u00ean h\u01a1n. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t \u0111\u00fang n\u1ebfu b\u1ea1n \u0111ang th\u1eed nghi\u1ec7m c\u00e1c m\u1eabu l\u1ed9n x\u1ed9n ho\u1eb7c nh\u1eefng m\u1eabu c\u00f3 c\u00e1c th\u00e0nh ph\u1ea7n n\u1eb7ng.<\/p>\n

L\u1ea5y m\u1eabu kh\u00f4ng gian \u0111\u1ea7u trong nhi\u1ec5m s\u1eafc kh\u00ed<\/h3>\n

Headspace sampling l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn kh\u00e1c. N\u00f3’ l\u00e0 m\u1ed9t c\u00e1ch \u0111\u1ec3 v\u01b0\u1ee3t qua m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 c\u1ee7a ti\u00eam tr\u1ef1c ti\u1ebfp, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u0111\u1ed1i v\u1edbi ch\u1ea5t ph\u00e2n t\u00edch bay h\u01a1i.<\/p>\n

Nguy\u00ean t\u1eafc l\u1ea5y m\u1eabu Headspace<\/h2>\n

L\u1ea5y m\u1eabu kh\u00f4ng gian \u0111\u1ea7u ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch ch\u1ec9 ki\u1ec3m tra c\u00e1c h\u1ee3p ch\u1ea5t bay h\u01a1i trong ph\u1ea7n kh\u00ed ph\u00eda tr\u00ean m\u1eabu. Khu v\u1ef1c kh\u00ed n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 “ Headspace. ” B\u1ea3n th\u00e2n m\u1eabu c\u00f3 th\u1ec3 l\u00e0 ch\u1ea5t l\u1ecfng ho\u1eb7c ch\u1ea5t r\u1eafn, v\u00e0 n\u00f3 \u1edf b\u00ean trong m\u1ed9t th\u00f9ng ch\u1ee9a k\u00edn.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p headspace t\u0129nh kh\u00e1 \u0111\u01a1n gi\u1ea3n. M\u1ed9t m\u1eabu \u0111\u01b0\u1ee3c \u0111\u1eb7t trong m\u1ed9t l\u1ecd ni\u00eam phong v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m n\u00f3ng. N\u00f3 ng\u1ed3i m\u1ed9t th\u1eddi gian cho \u0111\u1ebfn khi c\u00e1c b\u1ed9 ph\u1eadn bay h\u01a1i di chuy\u1ec3n v\u00e0o kh\u00ed headspace. M\u1ed9t khi m\u1ecdi th\u1ee9 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft, m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf kh\u00ed n\u00e0y \u0111\u01b0\u1ee3c l\u1ea5y v\u00e0 \u0111\u01b0a v\u00e0o m\u00e1y GC.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Purge-and-Trap. \u1ede \u0111\u00e2y, m\u1ed9t kh\u00ed inert \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 li\u00ean t\u1ee5c \u0111\u1ea9y c\u00e1c ch\u1ea5t bay h\u01a1i ra kh\u1ecfi m\u1eabu. Nh\u1eefng ch\u1ea5t bay h\u01a1i n\u00e0y sau \u0111\u00f3 \u0111\u01b0\u1ee3c thu th\u1eadp tr\u00ean m\u1ed9t b\u1eaby \u0111\u1eb7c bi\u1ec7t. Sau \u0111\u00f3, ch\u00fang \u0111\u01b0\u1ee3c th\u1ea3 ra kh\u1ecfi b\u1eaby v\u00e0 g\u1eedi \u0111\u1ebfn c\u1ed9t GC \u0111\u1ec3 ki\u1ec3m tra.<\/p>\n

L\u1ee3i \u00edch c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng Headspace Sampling<\/h2>\n

S\u1eed d\u1ee5ng l\u1ea5y m\u1eabu headspace c\u00f3 m\u1ed9t s\u1ed1 l\u1ee3i \u00edch quan tr\u1ecdng h\u01a1n ti\u00eam tr\u1ef1c ti\u1ebfp.<\/p>\n

M\u1eabu kh\u00ed t\u1eeb headspace GC l\u00e0 nhi\u1ec1u “ l\u00e0m s\u1ea1ch” b\u1edfi v\u00ec n\u00f3 kh\u00f4ng’ t c\u00f3 b\u1ea5t k\u1ef3 v\u1eadt ch\u1ea5t n\u1eb7ng, kh\u00f4ng bay h\u01a1i n\u00e0o. V\u00ec v\u1eady, \u0111i\u1ec1u n\u00e0y ng\u0103n ch\u1eb7n c\u1ed9t b\u1ecb qu\u00e1 t\u1ea3i ho\u1eb7c b\u1ea9n. N\u00f3 c\u0169ng gi\u00fap c\u1ed9t k\u00e9o d\u00e0i l\u00e2u h\u01a1n.<\/p>\n

V\u00ec ch\u1ec9 c\u00f3 c\u00e1c b\u1ed9 ph\u1eadn nh\u1eb9 nh\u00e0ng, d\u1ec5 bay h\u01a1i v\u00e0o m\u00e1y, c\u00f3 \u00edt m\u00e0i m\u00f2n h\u01a1n nhi\u1ec1u tr\u00ean c\u00e1c b\u1ed9 ph\u1eadn nh\u1ea1y c\u1ea3m. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 l\u1edbp l\u00f3t \u0111\u1ea7u v\u00e0o v\u00e0 c\u1ed9t don’ t b\u1ecb h\u01b0 h\u1ea1i nhanh nh\u1ea5t. Do \u0111\u00f3, b\u1ea1n don’ t ph\u1ea3i b\u1ea3o tr\u00ec th\u01b0\u1eddng xuy\u00ean.<\/p>\n

Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ea7n xem x\u00e9t<\/h2>\n

M\u1eb7c d\u00f9 n\u00f3 c\u00f3 c\u00e1c t\u00ednh n\u0103ng tuy\u1ec7t v\u1eddi, l\u1ea5y m\u1eabu headspace c\u00f3 gi\u1edbi h\u1ea1n ri\u00eang c\u1ee7a n\u00f3.<\/p>\n

Kh\u00f4ng gian \u0111\u1ea7u t\u0129nh c\u1ea7n th\u1eddi gian cho m\u1eabu v\u00e0 kh\u00ed ph\u00eda tr\u00ean \u0111\u1ec3 c\u00e2n b\u1eb1ng. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m cho vi\u1ec7c chu\u1ea9n b\u1ecb m\u1ea5t nhi\u1ec1u th\u1eddi gian h\u01a1n so v\u1edbi vi\u1ec7c ti\u00eam tr\u1ef1c ti\u1ebfp. T\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f3 th\u1ec3 gi\u00fap \u0111i\u1ec1u n\u00e0y, nh\u01b0ng th\u1eddi gian ch\u1edd \u0111\u1ee3i v\u1eabn c\u00f2n \u1edf \u0111\u00f3.<\/p>\n

Kh\u00f4ng ph\u1ea3i m\u1ecdi h\u1ee3p ch\u1ea5t \u0111\u1ec1u th\u00edch di chuy\u1ec3n v\u00e0o kh\u00f4ng gian \u0111\u1ea7u. Nh\u1eefng \u0111i\u1ec1u m\u00e0’ t r\u1ea5t bi\u1ebfn \u0111\u1ed9ng c\u00f3 th\u1ec3 kh\u00f4ng xu\u1ea5t hi\u1ec7n t\u1ed1t. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c t\u00edn hi\u1ec7u y\u1ebfu tr\u1eeb khi b\u1ea1n s\u1eed d\u1ee5ng m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p nh\u01b0 headspace \u0111\u1ed9ng \u0111\u1ec3 t\u1eadp trung ch\u00fang.<\/p>\n

S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa Headspace v\u00e0 Direct Injection GC<\/h3>\n

Bi\u1ebft c\u00e1ch hai ph\u01b0\u01a1ng ph\u00e1p n\u00e0y kh\u00e1c nhau gi\u00fap c\u00e1c nh\u00e0 ph\u00e2n t\u00edch ch\u1ecdn \u0111\u00fang ph\u01b0\u01a1ng ph\u00e1p cho c\u00f4ng vi\u1ec7c c\u1ee7a h\u1ecd.<\/p>\n

So s\u00e1nh c\u01a1 ch\u1ebf gi\u1edbi thi\u1ec7u m\u1eabu<\/h2>\n

Ti\u00eam tr\u1ef1c ti\u1ebfp \u0111\u1eb7t t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a m\u1eabu v\u00e0o h\u1ec7 th\u1ed1ng. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m c\u00e1c v\u1eadt li\u1ec7u kh\u00f4ng bay h\u01a1i. Tuy nhi\u00ean, Headspace GC ch\u1ec9 t\u1eadp trung v\u00e0o c\u00e1c h\u1ee3p ch\u1ea5t bay h\u01a1i trong kh\u00ed. \u0110i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t l\u1ef1a ch\u1ecdn tuy\u1ec7t v\u1eddi cho m\u1ed9t ph\u00e2n t\u00edch s\u1ea1ch s\u1ebd.<\/p>\n

T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn b\u1ea3o tr\u00ec thi\u1ebft b\u1ecb v\u00e0 tu\u1ed5i th\u1ecd d\u00e0i<\/h2>\n

B\u1edfi v\u00ec nh\u1eefng th\u1ee9 n\u1eb7ng kh\u00f4ng’ t \u0111i v\u00e0o m\u00e1y v\u1edbi l\u1ea5y m\u1eabu headspace, n\u00f3 ng\u0103n ch\u1eb7n c\u00e1c v\u1ea5n \u0111\u1ec1 c\u1ed9t. \u0110i\u1ec1u n\u00e0y gi\u00fap thi\u1ebft b\u1ecb k\u00e9o d\u00e0i l\u00e2u h\u01a1n. Ng\u01b0\u1ee3c l\u1ea1i, ti\u00eam tr\u1ef1c ti\u1ebfp c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nhi\u1ec1u cu\u1ed9c g\u1ecdi d\u1ecbch v\u1ee5 h\u01a1n v\u00ec gunk t\u1eeb c\u00e1c m\u1eabu ph\u1ee9c t\u1ea1p.<\/p>\n

S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u0111\u1ed9 nh\u1ea1y c\u1ea3m v\u00e0 gi\u1edbi h\u1ea1n ph\u00e1t hi\u1ec7n<\/h2>\n

Headspace GC th\u01b0\u1eddng r\u1ea5t t\u1ed1t trong vi\u1ec7c nh\u1eadn \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 \u0111\u00e1ng tin c\u1eady tr\u00ean c\u00e1c n\u1ed3ng \u0111\u1ed9 kh\u00e1c nhau. N\u00f3 c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y m\u1ed9t l\u01b0\u1ee3ng r\u1ea5t nh\u1ecf c\u00e1c h\u1ee3p ch\u1ea5t bay h\u01a1i, \u0111\u00f4i khi trong ph\u1ea1m vi sub-\u03bcg \/ mL. Tuy nhi\u00ean, ti\u00eam tr\u1ef1c ti\u1ebfp c\u00f3 th\u1ec3 t\u1ed1t h\u01a1n \u0111\u1ec3 t\u00ecm nh\u1eefng th\u1ee9 b\u00e1n bay h\u01a1i m\u00e0 kh\u00f4ng’ t di chuy\u1ec3n v\u00e0o headspace d\u1ec5 d\u00e0ng.<\/p>\n

Th\u00edch h\u1ee3p D\u1ef1a tr\u00ean Lo\u1ea1i ma tr\u1eadn m\u1eabu<\/h2>\n

C\u00e1c m\u1eabu c\u00f3 r\u1ea5t nhi\u1ec1u v\u1eadt li\u1ec7u kh\u00f4ng bay h\u01a1i ho\u1ea1t \u0111\u1ed9ng t\u1ed1t h\u01a1n v\u1edbi headspace GC. H\u00e3y ngh\u0129 \u0111\u1ebfn nh\u1eefng th\u1ee9 nh\u01b0 ch\u1ea5t l\u1ecfng sinh h\u1ecdc ho\u1eb7c d\u1ea7u d\u00e0y. Headspace cung c\u1ea5p m\u1ed9t c\u00e1ch s\u1ea1ch h\u01a1n \u0111\u1ec3 ki\u1ec3m tra ch\u00fang. Ti\u00eam tr\u1ef1c ti\u1ebfp l\u00e0 ph\u00f9 h\u1ee3p t\u1ed1t cho c\u00e1c m\u1eabu s\u1ea1ch ho\u1eb7c nh\u1eefng ng\u01b0\u1eddi c\u00f3 trang \u0111i\u1ec3m \u0111\u01a1n gi\u1ea3n.<\/p>\n

Ch\u1ecdn k\u1ef9 thu\u1eadt ph\u00f9 h\u1ee3p d\u1ef1a tr\u00ean nhu c\u1ea7u \u1ee9ng d\u1ee5ng<\/h3>\n

Ch\u1ecdn gi\u1eefa ti\u00eam tr\u1ef1c ti\u1ebfp v\u00e0 headspace GC th\u1ef1c s\u1ef1 ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ee5c ti\u00eau c\u1ee7a b\u1ea1n v\u00e0 m\u1eabu c\u1ee7a b\u1ea1n.<\/p>\n

Y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t khi ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p<\/h2>\n

N\u1ebfu b\u1ea1n \u0111ang nh\u00ecn v\u00e0o nh\u1eefng th\u1ee9 r\u1ea5t bi\u1ebfn \u0111\u1ed9ng, l\u1ea5y m\u1eabu headspace l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn tuy\u1ec7t v\u1eddi. Nh\u1eefng ch\u1ea5t n\u00e0y t\u1ef1 nhi\u00ean mu\u1ed1n tr\u1edf th\u00e0nh kh\u00ed, v\u00ec v\u1eady ph\u01b0\u01a1ng ph\u00e1p n\u00e0y ho\u1ea1t \u0111\u1ed9ng t\u1ed1t.<\/p>\n

M\u1eabu c\u1ee7a b\u1ea1n c\u00f3 d\u1ea7u n\u1eb7ng ho\u1eb7c ch\u1ea5t r\u1eafn c\u00f3 th\u1ec3 l\u00e0m r\u1ed1i m\u00e1y c\u1ee7a b\u1ea1n kh\u00f4ng? N\u1ebfu v\u1eady, headspace GC l\u00e0 m\u1ed9t c\u00e1ch s\u1ea1ch h\u01a1n \u0111\u1ec3 \u0111i v\u00e0 c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m th\u1eddi gian chu\u1ea9n b\u1ecb.<\/p>\n

Ti\u00eam tr\u1ef1c ti\u1ebfp nhanh ch\u00f3ng v\u00e0 cho ph\u00e9p b\u1ea1n th\u00f4ng qua nhi\u1ec1u m\u1eabu, nh\u01b0ng n\u00f3 c\u00f3 th\u1ec3 c\u00f3 ngh\u0129a l\u00e0 l\u00e0m s\u1ea1ch nhi\u1ec1u h\u01a1n. Headspace t\u0129nh ho\u1ea1t \u0111\u1ed9ng t\u1ed1t v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng t\u1ef1 \u0111\u1ed9ng nh\u01b0ng c\u00f3 th\u1ec3 m\u1ea5t nhi\u1ec1u th\u1eddi gian h\u01a1n \u0111\u1ec3 chu\u1ea9n b\u1ecb m\u1ed7i m\u1eabu v\u00ec b\u01b0\u1edbc c\u00e2n b\u1eb1ng.<\/p>\n

N\u00e2ng cao hi\u1ec7u su\u1ea5t ph\u00e2n t\u00edch th\u00f4ng qua t\u1ed1i \u01b0u h\u00f3a ph\u01b0\u01a1ng ph\u00e1p<\/h3>\n

B\u1ea5t k\u1ec3 b\u1ea1n ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p n\u00e0o, n\u00f3’ \u0110i\u1ec1u quan tr\u1ecdng l\u00e0 \u0111i\u1ec1u ch\u1ec9nh c\u00e1c c\u00e0i \u0111\u1eb7t \u0111\u1ec3 c\u00f3 k\u1ebft qu\u1ea3 t\u1ed1t.<\/p>\n

Nh\u1eefng c\u00e2n nh\u1eafc ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9<\/h2>\n

C\u1ea3 hai ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec1u ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o vi\u1ec7c c\u00f3 \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 \u0111\u00fang \u0111\u1eafn. \u0110\u1ed1i v\u1edbi ti\u00eam tr\u1ef1c ti\u1ebfp, nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea7u v\u00e0o ki\u1ec3m so\u00e1t m\u1eabu bi\u1ebfn th\u00e0nh kh\u00ed t\u1ed1t nh\u01b0 th\u1ebf n\u00e0o. \u0110\u1ed1i v\u1edbi headspace, l\u1ecd’ nhi\u1ec7t \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch c\u00e1c ch\u1ea5t bay h\u01a1i di chuy\u1ec3n v\u00e0o giai \u0111o\u1ea1n kh\u00ed.<\/p>\n

\u0110i\u1ec1u ch\u1ec9nh t\u1ef7 l\u1ec7 pha trong l\u1ea5y m\u1eabu Headspace<\/h2>\n

Trong headspace, b\u1ea1n c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u1ef7 l\u1ec7 kh\u1ed1i l\u01b0\u1ee3ng m\u1eabu v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng headspace. \u0110\u00e2y l\u00e0 t\u1ef7 l\u1ec7 giai \u0111o\u1ea1n. \u0110i\u1ec1u ch\u1ec9nh n\u00f3 c\u00f3 th\u1ec3 l\u00e0m cho ph\u01b0\u01a1ng ph\u00e1p nh\u1ea1y c\u1ea3m h\u01a1n, th\u1ef1c s\u1ef1 h\u1eefu \u00edch cho c\u00e1c VOC m\u1ee9c th\u1ea5p.<\/p>\n

Qu\u1ea3n l\u00fd l\u00f3t \u0111\u1ea7u v\u00e0o trong ti\u00eam tr\u1ef1c ti\u1ebfp<\/h2>\n

N\u00f3’ l\u00e0 m\u1ed9t \u00fd t\u01b0\u1edfng t\u1ed1t \u0111\u1ec3 l\u00e0m s\u1ea1ch ho\u1eb7c thay th\u1ebf l\u1edbp l\u00f3t \u0111\u1ea7u v\u00e0o th\u01b0\u1eddng xuy\u00ean. \u0110i\u1ec1u n\u00e0y ng\u0103n ch\u1eb7n v\u1eadt li\u1ec7u m\u1eabu c\u00f2n l\u1ea1i g\u00e2y ra v\u1ea5n \u0111\u1ec1 trong c\u00e1c l\u1ea7n ch\u1ea1y sau, m\u1ed9t b\u01b0\u1edbc quan tr\u1ecdng khi b\u1ea1n ki\u1ec3m tra c\u00e1c m\u1eabu b\u1ea9n nhi\u1ec1u l\u1ea7n.<\/p>\n

Giao th\u1ee9c hi\u1ec7u chu\u1ea9n v\u00e0 x\u00e1c nh\u1eadn cho k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c<\/h2>\n

B\u1ea1n ph\u1ea3i s\u1eed d\u1ee5ng c\u00e1c quy t\u1eafc ki\u1ec3m tra nghi\u00eam ng\u1eb7t cho c\u1ea3 headspace v\u00e0 GC ti\u00eam tr\u1ef1c ti\u1ebfp. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m hi\u1ec7u chu\u1ea9n th\u00edch h\u1ee3p. L\u00e0m nh\u01b0 v\u1eady \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 c\u1ee7a b\u1ea1n l\u00e0 \u0111\u00fang. N\u00f3 c\u0169ng l\u00e0 m\u1ed9t \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc trong c\u00e1c l\u0129nh v\u1ef1c nh\u01b0 s\u1ea3n xu\u1ea5t thu\u1ed1c v\u00e0 an to\u00e0n th\u1ef1c ph\u1ea9m.<\/p>\n

Persee: M\u1ed9t nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e1ng tin c\u1eady c\u1ee7a c\u00e1c d\u1ee5ng c\u1ee5 ph\u00e2n t\u00edch<\/h3>\n

PERSEE<\/u><\/a>\u00a0\u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn nh\u01b0 m\u1ed9t nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e1ng tin c\u1eady c\u1ee7a c\u00e1c c\u00f4ng c\u1ee5 ph\u00e2n t\u00edch hi\u1ec7n \u0111\u1ea1i. H\u1ecd t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec5m s\u1eafc m\u1ea1nh m\u1ebd cho nh\u00e2n vi\u00ean ph\u00f2ng th\u00ed nghi\u1ec7m tr\u00ean to\u00e0n th\u1ebf gi\u1edbi, bao g\u1ed3m c\u1ea3 n\u1ec1n t\u1ea3ng DI-GC v\u00e0 HS-GC.<\/p>\n

Ngu\u1ed3n g\u1ed1c c\u00f4ng ty v\u00e0 ch\u1ee9ng nh\u1eadn c\u00f4ng nghi\u1ec7p<\/h2>\n

Persee \u0111\u00e3 s\u1ea3n xu\u1ea5t c\u00e1c c\u00f4ng c\u1ee5 ch\u00ednh x\u00e1c trong nhi\u1ec1u th\u1eadp k\u1ef7. H\u1ecd c\u00f3 ch\u1ee9ng nh\u1eadn to\u00e0n c\u1ea7u nh\u01b0 ISO v\u00e0 CE. H\u1ecd gi\u00fap c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m c\u1ea7n c\u00f4ng ngh\u1ec7 s\u1eb5n s\u00e0ng \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n ch\u00ednh th\u1ee9c.<\/p>\n

T\u1ed5ng quan v\u1ec1 c\u00e1c t\u00ednh n\u0103ng h\u1ec7 th\u1ed1ng G5 GC<\/h2>\n

\"2\"<\/p>\n

Persee’ G5 G<\/u>C<\/u><\/a>\u00a0cho th\u1ea5y nh\u1eefng \u00fd t\u01b0\u1edfng m\u1edbi v\u1edbi thi\u1ebft k\u1ebf th\u00edch \u1ee9ng c\u1ee7a n\u00f3.<\/p>\n

X\u00e2y d\u1ef1ng m\u00f4-\u0111un c\u1ee7a n\u00f3 c\u00f3 ngh\u0129a l\u00e0 n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp theo nhi\u1ec1u c\u00e1ch. \u0110i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 tuy\u1ec7t v\u1eddi cho c\u1ea3 c\u00e1c d\u1ef1 \u00e1n nghi\u00ean c\u1ee9u t\u00f9y ch\u1ec9nh v\u00e0 s\u1eed d\u1ee5ng nh\u00e0 m\u00e1y ti\u00eau chu\u1ea9n.<\/p>\n

N\u1ec1n t\u1ea3ng G5 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c m\u00e1y d\u00f2 kh\u00e1c nhau, t\u1eeb FID v\u00e0 ECD \u0111\u1ebfn TCD. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 n\u00f3 c\u00f3 th\u1ec3 x\u1eed l\u00fd t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i nhu c\u1ea7u ph\u00e1t hi\u1ec7n trong m\u1ed9t m\u00e1y.<\/p>\n

N\u00f3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng v\u1edbi c\u00e1c thu\u1eadt to\u00e1n PID ti\u00ean ti\u1ebfn. Ch\u00fang \u0111\u1ea3m b\u1ea3o nhi\u1ec7t \u0111\u1ed9 v\u00e0 d\u00f2ng ch\u1ea3y r\u1ea5t \u1ed5n \u0111\u1ecbnh v\u00e0 ch\u00ednh x\u00e1c. \u0110\u00e2y l\u00e0 c\u00e1c c\u00e0i \u0111\u1eb7t ch\u00ednh \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 t\u01b0\u01a1ng t\u1ef1 m\u1ed7i l\u1ea7n.<\/p>\n

Cam k\u1ebft v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng, \u0111\u1ed5i m\u1edbi v\u00e0 h\u1ed7 tr\u1ee3 to\u00e0n c\u1ea7u<\/h2>\n

Persee \u0111\u1ea7u t\u01b0 v\u00e0o R& D v\u00e0 c\u00f3 m\u1ed9t m\u1ea1ng l\u01b0\u1edbi d\u1ecbch v\u1ee5 tr\u00ean to\u00e0n th\u1ebf gi\u1edbi. B\u1edfi v\u00ec \u0111i\u1ec1u n\u00e0y, ng\u01b0\u1eddi d\u00f9ng c\u00f3 \u0111\u01b0\u1ee3c c\u00e1c d\u1ee5ng c\u1ee5 \u0111\u00e1ng tin c\u1eady cho \u0111\u01b0\u1eddng d\u00e0i. H\u1ecd c\u0169ng c\u00f3 \u0111\u1ed9i ng\u0169 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt<\/u><\/a>\u00a0N\u00f3 nhanh ch\u00f3ng gi\u00fap \u0111\u1ee1 m\u1ecdi ng\u01b0\u1eddi \u1edf kh\u1eafp m\u1ecdi n\u01a1i.<\/p>\n

T\u00f3m t\u1eaft c\u1ee7a Key Insights<\/h3>\n

Khi so s\u00e1nh c\u1ea3 hai ph\u01b0\u01a1ng ph\u00e1p, ch\u00fang ta th\u1ea5y ch\u00fang c\u00f3 nh\u1eefng l\u1ee3i th\u1ebf kh\u00e1c nhau:<\/p>\n

    \n
  • Ti\u00eam tr\u1ef1c ti\u1ebfp: N\u00f3 nhanh h\u01a1n \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c th\u00f4ng qua c\u00e1c m\u1eabu. N\u00f3 c\u0169ng t\u1ed1t cho c\u00e1c m\u1eabu s\u1ea1ch n\u01a1i b\u1ea1n c\u1ea7n bi\u1ebft m\u1ecdi th\u1ee9 m\u00e0’ S b\u00ean trong.<\/li>\n
  • L\u1ea5y m\u1eabu Headspace: N\u00f3 gi\u1eef cho m\u00e1y s\u1ea1ch h\u01a1n. N\u00f3 ho\u00e0n h\u1ea3o \u0111\u1ec3 ki\u1ec3m tra VOC trong c\u00e1c m\u1eabu ph\u1ee9c t\u1ea1p.<\/li>\n<\/ul>\n

    Ph\u00f9 h\u1ee3p ph\u01b0\u01a1ng ph\u00e1p v\u1edbi m\u1eabu c\u1ee7a b\u1ea1n l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t. H\u01a1n n\u1eefa, s\u1eed d\u1ee5ng c\u00e1c h\u1ec7 th\u1ed1ng v\u1eefng ch\u1eafc nh\u01b0 G5 c\u1ee7a Persee s\u1ebd cung c\u1ea5p cho b\u1ea1n d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady v\u00e0 l\u1eb7p l\u1ea1i h\u01a1n trong ph\u00f2ng th\u00ed nghi\u1ec7m c\u1ee7a b\u1ea1n.<\/p>\n

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

    Q1: Lo\u1ea1i m\u1eabu n\u00e0o \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch t\u1ed1t nh\u1ea5t b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng headspace GC?
    \nA: Headspace GC l\u00e0 tuy\u1ec7t v\u1eddi \u0111\u1ec3 xem c\u00e1c h\u1ee3p ch\u1ea5t bay h\u01a1i trong c\u00e1c m\u1eabu ph\u1ee9c t\u1ea1p. V\u00ed d\u1ee5 t\u1ed1t l\u00e0 d\u01b0\u1ee3c ph\u1ea9m, th\u1ef1c ph\u1ea9m, n\u01b0\u1edbc m\u00f4i tr\u01b0\u1eddng ho\u1eb7c ch\u1ea5t l\u1ecfng sinh h\u1ecdc. Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0y, d\u01b0 l\u01b0\u1ee3ng n\u1eb7ng c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng thi\u1ebft b\u1ecb n\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng ti\u00eam tr\u1ef1c ti\u1ebfp.<\/p>\n

    Q2: T\u00f4i c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 nh\u1ea1y cao b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng HS-GC t\u0129nh kh\u00f4ng?
    \nA: V\u00e2ng, b\u1ea1n c\u00f3 th\u1ec3. B\u1ea1n c\u00f3 th\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u1ed9 nh\u1ea1y cao v\u1edbi HS-GC t\u0129nh n\u1ebfu b\u1ea1n \u0111i\u1ec1u ch\u1ec9nh tinh t\u1ebf c\u00e1c c\u00e0i \u0111\u1eb7t ph\u00edm. Ch\u00fang bao g\u1ed3m nhi\u1ec7t \u0111\u1ed9 \u1ee7, th\u1eddi gian b\u1ea1n ch\u1edd c\u00e2n b\u1eb1ng v\u00e0 t\u1ef7 l\u1ec7 pha. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 th\u1ec3 cung c\u1ea5p k\u1ebft qu\u1ea3 r\u1ea5t nh\u1ea5t qu\u00e1n cho nhi\u1ec1u nh\u00e0 ph\u00e2n t\u00edch, th\u01b0\u1eddng t\u00ecm th\u1ea5y ch\u00fang \u1edf m\u1ee9c r\u1ea5t th\u1ea5p.<\/p>\n

    Q3: C\u00f3 th\u1ec3 l\u1ea5y m\u1eabu t\u1ef1 \u0111\u1ed9ng v\u1edbi b\u1ea5t k\u1ef3 k\u1ef9 thu\u1eadt n\u00e0o kh\u00f4ng?
    \nA: T\u1ea5t nhi\u00ean. M\u00e1y hi\u1ec7n \u0111\u1ea1i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00e1y l\u1ea5y m\u1eabu t\u1ef1 \u0111\u1ed9ng l\u00e0m vi\u1ec7c v\u1edbi c\u1ea3 \u1ed1ng ti\u00eam tr\u1ef1c ti\u1ebfp v\u00e0 l\u1ecd kh\u00f4ng gian \u0111\u1ea7u. C\u00e1c h\u1ec7 th\u1ed1ng t\u1ef1 \u0111\u1ed9ng n\u00e0y c\u00f3 s\u1eb5n r\u1ed9ng r\u00e3i. H\u1ecd cung c\u1ea5p c\u00f4ng vi\u1ec7c \u1ed5n \u0111\u1ecbnh v\u00e0 gi\u1ea3m l\u1ed7i con ng\u01b0\u1eddi, \u0111i\u1ec1u n\u00e0y r\u1ea5t tuy\u1ec7t v\u1eddi cho c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng b\u1eadn r\u1ed9n.<\/p>\n

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

    Gas chromatography, or GC, is a common method for separating and figuring out volatile compounds in complex mixtures. It is a very important tool in both research labs and factories. This is because it’s accurate, fast, and can be used for many things. Importance of Analyzing Volatile Compounds Volatile organic compounds (VOCs) are found in […]<\/p>\n","protected":false},"author":1,"featured_media":3878,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[81,36],"tags":[],"class_list":["post-3877","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-petrochemical-and-chemical","category-applications"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts\/3877","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=3877"}],"version-history":[{"count":0,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/posts\/3877\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/media\/3878"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/media?parent=3877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/categories?post=3877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/vi\/wp-json\/wp\/v2\/tags?post=3877"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}