Extraction spectrophotometric determination of maneb with 1-(2'-pyridylazo)-2-naphthol (PAN) |
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Authors: | Rao A L Malik A K Kapoor J |
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Institution: | Department of Chemistry, Punjabi University, Patiala-147002, India. |
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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. |
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