巯基棉分离富集动力学荧光法测定痕量锑

Determination of Trace Antimony with Kinetic Fluoremetric Method Based on Separation and Enrichment by Sulfhydryl Cotton

在邻苯二甲酸氢钾-氢氧化钠（KH5C8O4-NaOH）介质中，研究了Sb（Ⅲ）-KIO4-3-（2’-甲基苯基）-5-（2＇-胂酸基苯偶氮）若丹宁反应体系，建立了测定锑的催化动力学荧光法。激发和发射波长为Aes／Aem=308nm／409nm，该方法的线性范围为1．67×10^-11～0．01×10^-6g／mL，检出限为1．67×10^-11g／mL，方法用于实际样品中进行测定，获得满意结果。

The reaction system of Sb （Ⅲ） -KIO4-3- （2＇-methylphenyl） -5- （2＇-arsenoxyl-phenylazo） rhodanine was studied in the medium of potassium hydrogen phthalate-sodium hydroxide, where a new method of determination trace antimony with catalytic kinetic fluoremetry was established. λex/λem = 308 nm/409 nm, the linear range is 1.67 × 10^-11 ～0.01 × 10^-6 g/mL, and the detection limit is 1.67 × 10^-11 g/mL. The method was applied to determine the real samples with satisfactory results.