分光光度法测定粉煤灰中微量锌

SPECTROPHOTOMETRIC DETERMINATION OF TRACE ZINC IN COAL FLY ASH

利用Ｚｎ（ Ⅱ） － ＳＣＮ－ － ＲｈＢ－ ＰＶＡ 显色反应体系进行锌（ Ⅱ） 的研究，建立了一种新的光度法测定痕量锌（ Ⅱ）－ 结果表明，在盐酸介质中具有高灵敏度的显色反应，表观摩尔吸光系数为１ ．５８ ×１０６ Ｌ／ｍｏｌ·ｃｍ ，Ｚｎ（ Ⅱ） 量在０ ．０ ～０ ．０４０ ｍｇ／Ｌ的范围内服从比耳定律－ 用于测定粉煤灰中微量锌，结果令人满意－ 图４ ，表１ ，参６－

An ultra sensitive spectrophotometric method for the determination of Zn 2+ was developed by using the Zn 2+ -SCN --RhB-PVA system.The results show that its apparent molar absorptivity coefficient of Zn 2+ -SCN --RhB associated ion is 1.58×10 6 L/mol·cm at 608 nm and Beer's law is obeyed for zinc in the range of 0.00～0.04 mg/L.Contents of zinc in coal fly ash were determined with satisfactory results.4figs.,1tab.,6refs.