缝管原子捕集原子吸收光谱法测定维生素B_（12）

The Application of Slotted Quartz Tube Atom-trapping Atomic Absorption Spectrometry to the Analysis of Vitamin B_(12)

本文研究了Ａｌ２Ｏ２涂层的开缝石英管原子捕集法测定ＣＯ的条件并通过测ＣＯ间接测定维生素Ｂ（１２）。结果表明，在优化条件下Ｃｏ的特征浓度为８×１０（－３）μｇ·ｍＬ（－１），比常规火焰原子吸收法的灵敏度提高８倍。采用本法测定腺苷辅酶维生素Ｂ（１２）中ＶＢ（１２）的含量，相对标准偏差１．１％，加标回收率９８．２～１００．４％。

in this paper, aluminium oxide coated quartz tube is employed to study the effect of different conditions on the sensitivity of cobalt. the result shows that the characteristic concentration under optimized conditions is 8 × 10-3μg. mL-1. The sensitivity increases 8 folds in comparison to the conventional PAAS. Vitsmin B12 in goblet Adensine Coenzyme Vitamin B12 is determined indirectly.