Rapid determination of hexavalent chromium in textiles by a novel ammonium pyrrolidine dithiocarbamate derivatization combined with UHPLC-MS/MS

2018 ◽  
Vol 41 (18) ◽  
pp. 3583-3589
Author(s):  
Xiaoli Zhang ◽  
Yanping Xian ◽  
Hui Li ◽  
Bo-xi Huang ◽  
Ming Liang ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Rapid Determination ◽  
Pyrrolidine Dithiocarbamate ◽  
Ammonium Pyrrolidine Dithiocarbamate

Determination of Cadmium, Copper, and Lead in Sodium Chloride Food Salts by Flame Atomic Absorption Spectroscopy

1986 ◽  
Vol 69 (5) ◽  
pp. 871-873
Author(s):  
M Jesus Alvarez de Eulate ◽  
Rosa Montoro ◽  
Nieves Ybañez ◽  
Miguel De La Guardia
Keyword(s):  
Sodium Chloride ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Pyrrolidine Dithiocarbamate ◽  
Flame Atomic Absorption Spectroscopy ◽  
Flame Atomic Absorption ◽  
Coefficients Of Variation ◽  
Ammonium Pyrrolidine Dithiocarbamate

Abstract A method for determination of Cd, Cu, and Pb in sodium chloride food salt samples has been developed. It consists of extraction in 4- methj 1-2-pentanonc of the complexes formed with ammonium pyrrolidine dithiocarbamate and further analysis of the extracts by flame atomic absorption spectroscopy. Detection limits in ng/g salt were 0.2 for Cd, 0.7 for Cu, and 10.0 for Pb. The coefficients of variation of 12 independent analyses were 13% for Cd (at a level of 0.4 ppb), 18% for Cu (1.6 ppb), and 5% for Pb (40 ppb). The recoveries were 100 ± 0% for Cd, 115 ± 14% for Cu, and 100 ± 13% for Pb.

Flameless Atomic Absorption Spectroscopic Determination of Heavy Metals in Whole-Fish Samples

1978 ◽  
Vol 61 (3) ◽  
pp. 664-667
Author(s):  
Iwao Okuno ◽  
James A Whitehead ◽  
Robert E White
Keyword(s):  
Atomic Absorption ◽  
Pyrrolidine Dithiocarbamate ◽  
Isobutyl Ketone ◽  
Flameless Atomic Absorption ◽  
Flameless Atomic Absorption Spectroscopy ◽  
Fish Samples ◽  
Ammonium Pyrrolidine Dithiocarbamate ◽  
Ppm Level ◽  
Carbon Rod Atomizer

Abstract Flameless atomic absorption spectroscopy with a carbon rod atomizer was used to determine lead, cadmium, and chromium in wholefish samples. Samples were dry-ashed, and the metals were separated by solvent extraction with ammonium pyrrolidine dithiocarbamate in methyl isobutyl ketone, and then back-partitioned into an aqueous acid solution for analysis. The back-partitioning step allows a direct comparison of sample solutions with aqueous solutions of the standard. Recoveries of the metals from fortified samples averaged 91% (±9.6) for lead and 100% (±5.6) for chromium at the 0.1–1 ppm level, and 100% (±13.3) for cadmium at the 0.01–0.1 ppm level.

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