用1-（2'-吡啶偶氮）-2-萘酚（PAN）萃取分光光度法测定代森锰

Extraction spectrophotometric determination of maneb with 1-(2'-pyridylazo)-2-naphthol (PAN).

作者信息

Rao A L, Malik A K, Kapoor J

机构信息

Department of Chemistry, Punjabi University, Patiala-147002, India.

出版信息

Talanta. 1993 Feb;40(2):201-3. doi: 10.1016/0039-9140(93)80322-i.

DOI:10.1016/0039-9140(93)80322-i

PMID:18965616

Abstract

A rapid, sensitive, simple and selective spectrophotometric method has been developed for the determination of micro-quantities of maneb (manganese ethylenebisdithiocarbamate) after extraction of the manganese-PAN complex in isobutyl methyl ketone (MIBK). The complex absorbs strongly at 550 nm. Beer's law is obeyed over the concentration range 0.37-3.75 microg/ml. The molar absorptivity was found to be 4.1 x 10(4) l. mole(-1) . cm(-1). The developed method has been applied to the determination of maneb in commercial formulations, synthetic mixtures, grain and in the presence of various other dithiocarbamates.

摘要

已开发出一种快速、灵敏、简便且选择性好的分光光度法，用于在异丁基甲基酮（MIBK）中萃取锰 - PAN络合物后测定微量代森锰（锰乙撑双二硫代氨基甲酸盐）。该络合物在550 nm处有强烈吸收。在0.37 - 3.75 μg/ml的浓度范围内符合比尔定律。摩尔吸光率为4.1×10⁴ l·mol⁻¹·cm⁻¹。所开发的方法已应用于商业制剂、合成混合物、谷物以及存在各种其他二硫代氨基甲酸盐情况下代森锰的测定。