Mohammed T. Khathi, A. Q. Abdulwahab, Zainab M. Kareem
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引用次数: 0
摘要
提出了一种用电热原子吸收光谱法(ETAAS)直接测定铬的新方法,该方法将一个1.0 cm × 0.3 cm的钽金属线圈置于石墨管中。对该方法测定铬的实验条件进行了优化。采用不带线圈和带线圈的无涂层石墨管构建了热解和雾化曲线。在10 ~ 50 ng/ml铬浓度范围内,校正曲线呈线性,相对标准偏差值分别为0.013、0.018和0.024µg/ml。测定回收率在(99.7 ~ 101)和标准偏差之间,评价了该方法的准确度和精密度,并成功地将不同浓度的标准溶液应用于人血清中铬的测定。
Determination of Chromium in blood serum using Atomic Absorption Spectrophotometric (AAS)
A new approach for the direct determination of chromium by Electrothermal Atomic Absorption spectrometry (ETAAS) is proposed, the method employs a 1.0 cm X 0.3 cm Tantalum metal coil placed in graphite tube. The experimental conditions for the determination of chromium via this method have been optimized. Pyrolysis and atomization curves are constructed using uncoated graphite tube without and with coil. The calibration curves were linear over the rang 10- 50 ng/ml of chromium concentration, with relative standard deviation values, at 0.013, 0.018 and 0.024µg/ml. the accuracy and precision of the method was evaluated by determining recoveries percentage between (99.7-101) and standard deviation and using different concentrations of standard solutions of this method was applied successfully for the determination of chromium in human blood serum.