Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7585535 | Food Chemistry | 2018 | 5 Pages |
Abstract
In order to examine the residues of thiacloprid (90 and 180â¯gâ¯a.i./ha) and deltamethrin (10 and 20â¯gâ¯a.i./ha) in fresh tea leaves, made tea and tea infusion, field experiments were conducted at three different locations viz. Kamalpur tea estate, Darjeeling; West Bengal, Teok tea Estate and AAU, Jorhat; Assam in India. Regardless of location and doses, residues of both the insecticides dissipated following first order kinetics. The half-life of Thiacloprid (4.93-5.38â¯days) was longer than that of deltamethrin (1.78-1.94â¯days). Processing of green tea leaves reduced the residue level of thiacloprid and deltamethrin in made tea. No residues of both these insecticides could be detected in tea infusion. With respect to the phenolic distribution in tea, a marked increase in total catechin monomers with thiacloprid and greater accumulation of EGCG and ECG (indices of phenol quality) with deltamethrin were observed.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Nitesh Sharma, Hemanta Banerjee, Srikumar Pal, K.K. Sharma,