Separation and determination of selenium(IV) and tellurium(IV) carbodithioates by thin-layer chromatography and visible spectrophotometry using morpholine-4-carbodithioate

Determination of Tellurium in Tellurium-Containing Organic Compounds by Microwave Plasma-Atomic Emission Spectrometry

“…The increased interest in this field is due to widely use of these substances as catalysts in organic reactions (e.g., rubber vulcanization), inhibitors of metal corrosion, insecticides, fungicides, components of special photographic materials, pharmaceuticals etc [1][2][3][4][5]. In view of great practical importance of these compounds for science and technology, a large number of analytical methods for the determination of tellurium in various objects were developed: gravimetric methods based on the precipitation of elemental tellurium by treating with inorganic and organic reducing agents, [6][7][8]; titrimetric methods based on redox reactions using iodide-anion, salts of iron(II), chromium(II) or titanium(III) as reducing agents, as well as potassium permanganate or dichromate as oxidizing agents for Te (IV), [9][10][11]; electrochemical methods, which allow one to determine the tellurium and selenium at simultaneous presence with a sensitivity being 10 -5 M, [12][13][14]; spectrophotometric methods based on the formation of complexes with sulfur-containing organic reagents (diethyldithiocarbamate, thiurea, and their derivatives, bismuthiol II, and so on [15,16] or on the formation of ion pairs of tellurium acido complexes with organic bases-pyrazolone derivatives and rhodamine dyes [17][18][19]. Three spectrophotometric methods were used to determine small tellurium content in the environment (water, plant material, soil), and thin telluride films [20].…”

Determination of Cadmium and Zinc in Fertilizer Samples by FAAS after Solid-Phase Extraction with Freshly Precipitated Manganese-diethyldithiocarbamate

“…[1][2][3][4][5][6] In this technique, the dithiocarbamate extraction method is a useful means of enrichment, and dithiocarbamates do not react with many metals that are fairly abundant in environmental samples. To the preconcentration of trace metals, it has been applied prior to their determination by UV-VIS spectrophotometry, [7][8][9][10][11][12][13][14][15] AAS, [16][17][18][19][20][21]23 and electroanalytical method. 24,25 In these studies, sodium diethyldithiocarbamate (NaDDTC), ammonium pyrolidinedithiocarbamate (APDC) or ammonium hexamethylenedithiocarbamate (HMDC) reagent was added to an aqueous phase containing several metals.…”