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A spectrophotometric method has been developed for the assay of dazomet, a soil fumigant effective for the control of nematodes, germinating weeds and soil fungi, using the copper(II)-neocuproine (2,9-dimethyl-1,10-phenanthroline) oxidizing reagent. A highly colored copper(I)-neocuproine chelate formed immediately in ammonium acetate-buffered solution a result of the redox reaction with dazomet, and...
The possibility of the utilization of the copper(II)-neocuproine spectrophotometric method, which has previously been shown to permit the determination of various reducing agents, to the determination of vitamin E was investigated. The molar absorptivity for vitamin E was found to be (2.1 ± 0.1) 10 4 l mol -1 cm -1 and Beer's law was obeyed between 2.4 10 ...
The literature catalytic-spectrophotometric method of selenium (Se) determination based on the catalytic action of Se(IV) on the sulfide reduction of methylene blue has been critically analyzed by means of fixed absorbance, fixed time and decolorization (induction) period methods. The logarithm of the induction period (time required to nullify A 660 of MB,t i ) was linearly...
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