缝管原子捕集原子吸收光谱分析研究

缝管原子捕集原子吸收光谱分析研究 STUDY OF ALOTTED QUARTZ TUBE ATOM-TRAPPING ATOMIC ABSORPTION SPECTROMETRY 黄淦泉 1 first-author 钱沙华 1 杨海燕 1 武汉大学环境科学系 武汉大学环境科学系 Department of Environmental Sciences, Wuhan University Department of Environmental Sciences, Wuhan University 研究了Ａｇ，Ａｕ，Ｂｉ，Ｃｄ，Ｃｏ，Ｃｕ，Ｇａ，Ｉｎ，Ｎｉ，Ｐｂ，Ｐｄ，Ｓｂ，Ｚｎ等１３个元素的原子捕集与释放条件．结果表明，缝管高度和火焰状态对灵敏度影响极大．在最佳实验条件下，捕集１ｍｉｎ，测得Ａｇ，Ａｕ，Ｂｉ，Ｃｄ，Ｃｏ，Ｃｕ，Ｇａ，Ｉｎ，Ｎｉ，Ｐｂ，Ｐｄ，Ｚｎ的特征浓度分别为８．１×１０－４，１．７×１０－３，３．５×１０－３，３．７×１０－５，１．６×１０－２，１．８×１０－３，１．６×１０２，３．６×１０－３，２．２×１０－２，２．４×１０３，４．７×１０－２，１．８×１０－３，１．３×１０－４ｍｇ·Ｌ－１，比常规火焰原子吸收光谱法的灵敏度依次提高６２，１０６，２５４，２７０，５，２８，１３１，２７１，３，８３，５，２３９，７７倍，本法测定了环境、生物、医药和金属等试样中痕量元素． The optimal conditions of the atom-trapping and the releasa of Ag,Au,Bi,Cd,Co,Cu, Ga, In, Ni, Ph, Pd, Sb, Zn are examined in detail. The results show that the height of the slotted tube and the flame state were found to have significant effect on the sensitivities of the abovementioned 13 elements. The Characteristic concetrations measured after trapning for 1 min. under optimum conditions are Ag 8. 1 × 10-4,An 1. 7 × 10-3,Bi 3. 5 × 10-3,Cd3. 7 × 10-5,Co 1. 6× 10-2,Cu 1. 8× 10-3,Ga 1. 6 × 10-2,In 3. 6× 10-3,Ni 2. 2× 10-2,Ph 2. 4× 10 -3,Pd 4. 7× 10-2,Sb 1. 8 × 10-3,Zn 1. 3 × 10-4mg·L-1. Thus slotted tube atomtrapping AAS yields increases in sensitivity for Ag, An,Bi, Cd,Co,Cu,Ga, In, Ni, Ph,Pd, Sb and Zn of 62, 106, 254, 270, 5, 28, 131, 271, 3, 83, 5, 239, 77 fold respectively in comparison to the conventional FAAS. Trace elements in environmental, biological, medical, pure metal and catalyst etc. samples have been determined. 原子吸收光谱法 原子捕集 金属分析 atomic absorption spectrometry atom-trapping metal analysis O657.31 湖北省自然科学基金(2017CFA007) 1995-06-01 2021-04-01 6