摘要
本文研究了以邻苯二酚紫为显色剂固相分光光度法测定痕量锡的新方法 ,在 pH =2 5条件下直接在树脂相于最大吸收波长 5 70nm处测量 ,锡含量在 0～ 15 0 μg·L- 1 范围内符合比尔定律 ,表观摩尔吸光系数可达 7 2× 10 6L·mol- 1 ·cm- 1 。
A new method for the determination of trace amounts of tin by resin-phase spectrophotometry has been developed and the detailed experimental conditions investigated.Tin ion reacts with procatechol violet(PV) in potassium hydrogen phthalate-HCl buffer media(pH2.5) to form a stable complex.The complex enriched on an anion-exchange resin has a maximum absorption wavelength of 570 nm.The absorbance is directly proportional to the concentration of tin in the region of 0-150 μg·L -1 with an apparent molar absorptivity of 7.2×10 6L·moL -1·cm -1.Most of the co-existed metal ions do not interfere the determination of tin ion.The developed procedure has been successfully employed to the determination of tin in some food examples.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2002年第1期118-119,共2页
Spectroscopy and Spectral Analysis
基金
甘肃省环保基金资助
