【摘要】 研究了溴化汞络阴离子与四乙基罗丹明B离子缔合物在聚氯乙烯膜(PVC膜)上的吸附,并建立了聚氯乙烯膜固相光度(PVC膜光度法)测定微量汞(Ⅱ)的高灵敏度分析方法。方法的线性范围为0～7μg/10ml,检出限为4×10-8g/10ml,该体系灵敏度高,稳定性好,用于水样中微量汞的测定,结果满意。更多还原

【Abstract】 The adsorption behavior of the ion association complex formed between HgBr^2-4 and cation of tetraethyl rhodamine B(H2RB²⁺) on the PVC film was studied. The absorption maxima of the association complex on the film was found at 560nm. Based on these facts, a method of solid-phase photometric （on the PVC film） determination of trace amounts of mercury by DW-photometric measurement （λ1=620nm, λ2=560nm） was proposed. Beer′s law holds in the range of 0～7μg of Hg（Ⅱ） per 10ml of solution. The limit of detection was found to be 4×10^-8g of Hg（Ⅱ） per 10ml of solution. The proposed method has been satisfactorily applied to the analysis of tap water. RSD′s （n=11） found at the concentration level of 5μg of Hg（Ⅱ） in 10ml of the test solution was 30%.更多还原