01  Superior Performance
Equipped with a total reflection aspherical achromatic optical system aspherical achromatic optical system and self-developed high-reflectivity UV coating technology,the instrument delivers excellent spot uniformity and luminous flux, significantly improving the signal-to-noise ratio.

02  Integrated Optical Platform with Excellent Stability
The integrated platform design and rational component layout ensure outstanding thermal stability and shock resistance.

03  Powerful Background Correctior
Both flame and graphite furnace atomization systems adopt the polarized Zeeman mode, enabling Zeeman background correction across the full wavelength range. It achieves an excellent background correction ratio of over 150 times at 1 Abs and over 100 times at 2 Abs.

04  Real-time dual detectors ensurelong-term operational stability
Two polarized light beams correspond to two simultaneously operating detectors, enabling real-time background correction for accurate m easurement results.

Determination of Calcium in Food
Calcium detection in food is of great significance fornutritional fortification assessment, quality control andsafety supervision. The accuracy of test results directlydepends on instrument sensitivity and stability.<br>Testdata of the A500 calcium detection system shows: intra-day slope range of standard curve is only 0.0004 Abs/(mg/L), inter-day slope range is 0.0010 Abs/(mg/L), andprecision of 7 tests within 30 minutes (5-minute interval)reaches 0.18%-0.49%
The instrument delivers excellent sensitivity andstability with good intra-day and inter-day repeatability,effectively ensuring the reliability of calcium detection dataand fully meeting the long-term stability requirements ofthe food industry. The performance fully verifies its abilityto maintain high-precision output in continuous testing.
In accordance with the detection requirementsfor strontium in mineral water specified in GB 8537,experimental verification shows that the instrumentallimit of quantitation is 0.0061 mg/L, which is significantlybetter than the standard limit of 0.01 mg/L and meets thesensitivity requirements for trace analysis.<br>ll paralleltests on low-concentration actual samples (0.104 mg/L) show a relative standard deviation (RSD) of 0.76%,confirming good precision and excellent stability. Double-point spike recovery tests on two types of commercialmineral water show recovery rates of 98.9%~102.0%.
The A500 Zeeman flame spectrophotometer meetsnational standard requirements in sensitivity, repeatabilityand accuracy for strontium detection in mineral water.
Determination of Chromium in Feed
AdditivesAccording to GB/T 13088-2006, determination ofchromium in feed additives is essential for heavy metalpollution control, animal health protection and foodsafety.<br>Experimental verification shows that the limitof quantitation measured by the A500 Zeeman flameatomic absorption spectrometer is 0.14 mg/kg, betterthan the standard detection limit of 0.15 mg/kg, meetingthe sensitivity requirement for trace detection. The spikerecovery rate is 93.5%~100.3%, which strictly meetsthe standard quality control requirement (80%~110%),confirming reliable accuracy.cbr>The A500 Zeeman flamespectrophotometer meets national standards in bothsensitivity and accuracy for chromium testing in feedad ditives.