Titration of some metal diethyldithiocarbamates by iodine in chloroform

Abstract

performed well; but shorter columns, 4-foot and less, gave rise to poorer yields. As the column is shortened, water solutions are adversely affected to a greater degree than alcohol solutions.Column Temperature. Low initial temperatures and programmed temperature analysis produced the best results for polyols. The fatty acids and dicarboxylic acids were not as sensitive to column temperature changes. Silylation Reagent. SILYL • 8 is composed of three powerful TMS agents which are claimed to have a synergistic effect on silylatable materials. It was developed as a column conditioner for improving column efficiency, reducing tailing, and removing silylatable residues from columns. Silylanizing agents that release HC1 into the system are absent. Some

Development of a derivative spectrophotometric method for the determination of fungicide zinc ethylenebisdithiocarbamate using sodium molybdate

“…Dithiocarbamates have been determined in vegetables and food stuffs using HPLC, 21 extraction voltammetry 22 and titrimetry. 23 Dithiocarbamates (DTCs) can also be determined by methods like, iodometry 24,25 and indirect complexometry 26 etc. Although, the methods discussed above have various disadvantages, such as methods other then gas chromatography are indirect, time consuming and less sensitive.…”

Fourth derivative spectrophotometric determination of fungicide ziram (zinc(II) dimethyldithiocarbamate) in commercial samples and wheat grains

“…The extraction of the molybdenum complex is slow, and complexation occurs in acid medium. Other methods for determination of dithiocarbamates than those mentioned above include iodometry in anhydrous solvents [13,14] indirect titration with EDTA [15], polarography [16], and determination of the metallic component of the pesticide using different methods [17]. McLeod and McCulley [18] determined dithiocarbamate fungicides by headspace gas chromatography of the carbon disulphide evolved in controlled conditions from foodstuffs, and similar methods were also given by the Committee for Analytical Methods [19].…”

Fourth-derivative spectrophotometric determination of fungicide ferbam (iron(III) dimethyldithiocarbamate) in a commercial sample and wheat grains using 2,2′-bipyridyl

“…Ferbam is also determined by converting it into molybdenum [8], copper [9] and phenanthroline [10] complexes. Dithiocarbamates can also be determined by methods other than acid decomposition and these include iodometry in anhydrous solvents [11,12] indirect titration with EDTA [13], polarography [14] and determination of the metallic component of the pesticide using different methods [15,16]. McLeod and McCulley [17] determined dithiocarbamate fungicides by head-space gas chromatography of the carbon disulfide evolved in controlled conditions from foodstuffs and similar methods were also given by the Committee for Analytical Methods [18].…”

“…Dithiocarbamate are also determined by FTIR spectrometry [20], but the method lacks sensitivity. However, all these methods suffer from the following disadvantages: a) Methods other then gas chromatography are indirect [1,8,10,11,12,13,15,16] time-consuming and sensitivity is low. b) Gas chromatographic methods are sensitive but suffer from lack of selectivity, since all dithiocarbamate pesticides evolve carbon disulfide on acid hydrolysis.…”