Merck
  • Início
  • Resultados da busca
  • Dissipation kinetics and effect of different decontamination techniques on the residues of emamectin benzoate and spinosad in cowpea pods.

Dissipation kinetics and effect of different decontamination techniques on the residues of emamectin benzoate and spinosad in cowpea pods.

Environmental monitoring and assessment (2014-04-01)
V Vijayasree, Hebsy Bai, Thomas Biju Mathew, Thomas George, George Xavier, N Pratheesh Kumar, S Visalkumar
RESUMO

Dissipation and decontamination of the semisynthetic macrolide emamectin benzoate and the natural insecticide spinosad on cowpea pods were studied following field application at single and double doses of 11.0 and 22 and 73 and 146 g ai ha(-1), respectively. Residues of these naturalytes were estimated using LC-MS/MS. The initial deposit of 0.073 and 0.153 mg kg(-1) of emamectin benzoate dissipated below quantitation level on the fifth and seventh day at single and double dosage, respectively. For spinosad, the initial deposits of 0.94 and 1.90 mg kg(-1) reached below quantitation level on the 7th day and 15th day at single and double dosage, respectively. The half-life of emamectin benzoate and spinosad was 1.13-1.49 and 1.05-1.39 days with the calculated safe waiting period of 2.99-6.12 and 1.09-3.25 days, respectively, for single and double dosage. Processing of the harvestable pods with different decontamination techniques resulted in 33.82 to 100 % removal 2 h after the application of emamectin benzoate and 100 % removal 3 days after spraying, while the removal was 42.05 to 87.46 % 2 h after the application of spinosad and 38.05 to 68.08 % 3 days after application.

MATERIAIS
Número do produto
Marca
Descrição do produto

Sigma-Aldrich
Sodium sulfate, ACS reagent, ≥99.0%, anhydrous, granular
Sigma-Aldrich
Sodium sulfate, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., anhydrous, ≥99.0%
Sigma-Aldrich
Sodium sulfate, ACS reagent, ≥99.0%, anhydrous, powder
Sigma-Aldrich
Magnesium sulfate solution, for molecular biology, 1.00 M±0.04 M
Sigma-Aldrich
Sodium chloride solution, 5 M
Sigma-Aldrich
Sodium chloride solution, 5 M in H2O, BioReagent, for molecular biology, suitable for cell culture
Sigma-Aldrich
Sodium sulfate, BioXtra, ≥99.0%
Sigma-Aldrich
Sodium sulfate, ≥99.0%, suitable for plant cell culture
Sigma-Aldrich
Sodium chloride, BioXtra, ≥99.5% (AT)
Sigma-Aldrich
Sodium chloride, BioReagent, suitable for cell culture, suitable for insect cell culture, suitable for plant cell culture, ≥99%
Sigma-Aldrich
Sodium chloride solution, 0.9% in water, BioXtra, suitable for cell culture
Sigma-Aldrich
Sodium chloride, tablet
Sigma-Aldrich
Sodium chloride, meets analytical specification of Ph. Eur., BP, USP, 99.0-100.5%
Sigma-Aldrich
Sodium chloride, for molecular biology, DNase, RNase, and protease, none detected, ≥99% (titration)
Sigma-Aldrich
Sodium chloride, AnhydroBeads, −10 mesh, 99.99% trace metals basis
Sigma-Aldrich
Sodium chloride, AnhydroBeads, −10 mesh, 99.999% trace metals basis
Sigma-Aldrich
Sodium sulfate, ≥99.99% trace metals basis
Sigma-Aldrich
Sodium chloride, BioUltra, for molecular biology, ≥99.5% (AT)
Sigma-Aldrich
Sodium chloride solution, BioUltra, for molecular biology, ~5 M in H2O
Sigma-Aldrich
Sodium chloride, tested according to Ph. Eur.
Sigma-Aldrich
Sodium sulfate, BioUltra, anhydrous, ≥99.0% (T)
Sigma-Aldrich
Sodium sulfate, tested according to Ph. Eur., anhydrous
Sigma-Aldrich
Sodium chloride, 99.999% trace metals basis
Sigma-Aldrich
Sodium chloride-35Cl, 99 atom % 35Cl
Sigma-Aldrich
Sodium chloride, random crystals, optical grade, 99.9% trace metals basis
Supelco
Sodium sulfate, for pesticide residue analysis
Supelco
Sodium chloride, certified reference material for titrimetry, certified by BAM, ≥99.5%
Sigma-Aldrich
Magnesium sulfate solution, BioUltra, for molecular biology
Sigma-Aldrich
Acetonitrile solution, contains 0.1 % (v/v) trifluoroacetic acid, suitable for HPLC
Sigma-Aldrich
Sodium chloride solution, 0.85%