Výsledky vyhledávání - "Urmila Tamrakar"

A spectrophotometric method for the determination of fenvalerate and cypermethrin in presence of each other

Autor: Urmila Tamrakar, Vinay K. Gupta, Ajai K. Pillai

Publikováno v: Journal of Analytical Chemistry. 67:437-442

A simple spectrophotometric method has been proposed for the determination of widely used pyrethroid pesticides, cypermethrin and fenvalerate. The method is based on the hydrolysis of these pesticides, upon which they release cyanide. The cyanide is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::907bfce5069c8cfcba5be97456e0079f
https://doi.org/10.1134/s1061934812050127

Zobrazit plný text záznamu

Spectrophotometric analysis of carbamate pesticides after thermal gradient separation

Autor: Urmila Tamrakar, Vinay K. Gupta, Ajai K. Pillai

Publikováno v: Journal of Planar Chromatography – Modern TLC. 22:77-82

A simple and sensitive method is reported for separation, detection, and simultaneous analysis of three-carbamate pesticides, carbaryl, propoxur, and carbosulfan. The method is based on reaction of the pesticides with p -aminoacetanilide in alkaline

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a7b039fc30f801060f00e35b069eccc5
https://doi.org/10.1556/jpc.22.2009.2.1

Zobrazit plný text záznamu

Determination of atrazine in environmental and biological samples using solid phase extraction and spectrophotometry

Autor: Vinay K. Gupta, Ajai K. Pillai, Sunitha B. Mathew, Urmila Tamrakar

Publikováno v: Journal of Analytical Chemistry. 64:386-389

An analytical method employing a combination of solid phase extraction and spectrophotometry is proposed for the determination of a widely used herbicide atrazine. This combination is very simple and cheaper than chromatography and mass spectrometry

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1f943c6d6b7e0a1bf19644744f3a7b95
https://doi.org/10.1134/s106193480904011x

Zobrazit plný text záznamu

A simple colorimetric method for the determination of carbofuran and its application in environmental and biological samples

Autor: Vinay K. Gupta, Ajai K. Pillai, Urmila Tamrakar

Publikováno v: Journal of the Brazilian Chemical Society v.18 n.2 2007
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Journal of the Brazilian Chemical Society, Volume: 18, Issue: 2, Pages: 337-341, Published: APR 2007

A simple spectrophotometric method based on the coupling of a carbamate pesticide, carbofuran (2, 3-dihydro, 2, 2-dimethyl-7-benzofuranyl methyl carbamate) with diazotized p-aminoacetophenone (DPAAP) under alkaline condition is described. The orange

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74f8b549a9a072b22476916f85193386
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000200014

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání