【摘要】 研究了Triton X-100存在下HCPCF与锌的反应条件.在pH9～10氨水-氯化铵介质中,HCPCF与锌形成稳定的蓝色配合物,在645nm波长处具有最大吸收,摩尔吸光系数为2.8×10~4,锌量在0～20μg/25ml范围内符合比耳定律,用磺基水杨酸钠、柠檬酸钠和铜试剂作掩蔽剂,多数金属离子不干扰锌的测定,可直接用于人发及铝合金中微量锌的测定.方法准确、快速、简便.更多还原

【Abstract】 A study is made on the conditions of chromogenic reaction of zinc（Ⅱ） with 1. 5-Bi（2-hydroxy-5-chlorobenzene）-3-cyanoformazane （abbreviated as HCPCF）. In an ammonical buffer solution of pH 9-10, Zn（Ⅱ） reacts with HCPCF to form a stable blue complex with its absorption maxima at 645nm- Its molar absorptivity is found to be 2. 8×10⁴L · cm^-1 · mol^-1. Beer’s law holds over the zinc（Ⅱ） concentration of 0-20μg/25ml. The in-terferences from most co-existing metal ions are eliminated by the use of sodium sulfosalicyl ate, sodium citrate and DDTC as masking agents. The proposed method is accurate, rapid and simple, and can be used in the determina-tion of zinc in human hair and aluminum alloys.更多还原