摘要
合成了新显色剂1-偶氮苯3-（6-甲氧基-2-苯并噻唑）-三氮烯（ABMBTT），并用元素分析和红外光谱法对其分子结构作了验证。研究了该试剂与汞的显色反应，在pH9．5～11．0的硼酸盐缓冲介质中，有Triton X-100存在下，ABMBTT与汞反应形成2：1的橙红色络合物，其最大吸收波长在520nm处，表观摩尔吸光系数为1.50×10^5L·mol^-1·cm^-1，汞的浓度在0～20μg／25mL范围内符合比耳定律。在焦磷酸钠存在下，常见离子基本不干扰。已应用于工业废水中微量汞的测定，测定结果的RSD小于3．5%，与二苯硫腙光度进行验证，结果吻合。
A new chromogenic reagent, 1-（ 4-azobenzene ）-3-（ 6-methoxy-2-benzothiazolyl）-triazene （abbreviated as ABMOBTT）, was synthesized and its molecular structure proved by elementay analysis and ultra-red spectrometry. It was found that an orange-red colored complex with mole ratio of （R ： Hg） 2 to 1 by the reaction of ABMOBTT with Hg（ Ⅱ ） in a borate buffer medium of pH around 10 （ pH 9. 5 - 11.0） and in the presence of Triton X-100. The absorption maxima was found at 520 nm, where the apparent molar absorptivity was found to be 1.50×10^5L·mol^-1·cm^-1. Beer＇s law was kept in concentration range of 0 to 20 μg of Hg（ Ⅱ ） per 25 mL of solution. By the addition of sodium pyrophosphate as masking agent, no interference from most of commonly coexisting ions was observed. The proposed method has been used in the determination of mercury in industrial waste water, giving RSD＇s less than 3.5%. The analytical results obtained by this method checked very well with the results obtained by the conventional dithizone photometric method.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2006年第2期100-102,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
广西自然科学基金资助(9811026)
作者简介
王文革（1968-），男，湖南衡阳人，硕士。研究方向为有机试剂的合成及应用。
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