分析试验室
分析試驗室
분석시험실
ANALYTICAL LABORATORY
2009年
8期
51-54
,共4页
4-(邻甲基苯氨基重氮基)-4'-硝基偶氮苯%Hg%合成%分光光度法
4-(鄰甲基苯氨基重氮基)-4'-硝基偶氮苯%Hg%閤成%分光光度法
4-(린갑기분안기중담기)-4'-초기우담분%Hg%합성%분광광도법
4-(o-methylbenzeneaminodiazo)-4′-nitroazobenzene%Mercury(Ⅱ)%Synthesis%Spectrophotometry
合成了一种新三氮烯试剂4-(邻甲基苯氨基重氮基)-4'-硝基偶氮苯(OMADNA), 并研究了其物化性质及与Hg(Ⅱ) 的显色反应. 结果表明, 在乳化剂OP存在下, 在pH 10.2的Na2B4O7-NaOH缓冲介质中, Hg(Ⅱ)与该试剂形成稳定的桔红色络合物, 最大吸收波长位于570 nm, 表观摩尔吸光系数为1.42×105 L·mol-1·cm-1, Hg(Ⅱ)的质量浓度在0～0.9 μg/mL范围内服从比耳定律. 所拟方法用于环境水样中微量Hg(Ⅱ)的直接测定, 结果与双硫腙法一致.
閤成瞭一種新三氮烯試劑4-(鄰甲基苯氨基重氮基)-4'-硝基偶氮苯(OMADNA), 併研究瞭其物化性質及與Hg(Ⅱ) 的顯色反應. 結果錶明, 在乳化劑OP存在下, 在pH 10.2的Na2B4O7-NaOH緩遲介質中, Hg(Ⅱ)與該試劑形成穩定的桔紅色絡閤物, 最大吸收波長位于570 nm, 錶觀摩爾吸光繫數為1.42×105 L·mol-1·cm-1, Hg(Ⅱ)的質量濃度在0～0.9 μg/mL範圍內服從比耳定律. 所擬方法用于環境水樣中微量Hg(Ⅱ)的直接測定, 結果與雙硫腙法一緻.
합성료일충신삼담희시제4-(린갑기분안기중담기)-4'-초기우담분(OMADNA), 병연구료기물화성질급여Hg(Ⅱ) 적현색반응. 결과표명, 재유화제OP존재하, 재pH 10.2적Na2B4O7-NaOH완충개질중, Hg(Ⅱ)여해시제형성은정적길홍색락합물, 최대흡수파장위우570 nm, 표관마이흡광계수위1.42×105 L·mol-1·cm-1, Hg(Ⅱ)적질량농도재0～0.9 μg/mL범위내복종비이정률. 소의방법용우배경수양중미량Hg(Ⅱ)적직접측정, 결과여쌍류종법일치.
The synthesis of a new triazene reagent 4-(o-methylbenzeneaminodiazo)-4′-nitroazobenzene (OMADNA) and the optimum conditions of its color reaction with mercury(Ⅱ) were studied. In the presence of emulsifying reagent OP, Hg(Ⅱ) reacts with OMADNA to form a stable orange-red complex in a medium of borax-NaOH buffer of pH 9.5～11.0. The apparent molar absorptivity is 1.42×105 L·mol-1·cm-1. At the maximum absorption of 570 nm, Beer′s law was obeyed in the concentration range of 0～0.9 μg/mL for Hg(Ⅱ). The method has good sensitivity and selecttivity. It has been directly applied to the determination of trace mercury(Ⅱ) in waste water samples and the determination results are in agreement with those by dithizone method.
