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Master's Dissertation
DOI
https://doi.org/10.11606/D.11.1980.tde-20220207-180348
Document
Author
Full name
Deosdedes Francisco Barcellos
Institute/School/College
Knowledge Area
Date of Defense
Published
Piracicaba, 1980
Supervisor
Title in Portuguese
Resíduos de inseticidas clorados, fosforados, clorofosforados, mistura de clorados + fosforados e carbamatos em polpa e casca de frutos de abacaxis Ananas comosus (L.) Merril
Keywords in Portuguese
ABACAXI
CASCA
POLPA
RESÍDUOS DE INSETICIDAS
Abstract in Portuguese
O presente trabalho objetivou a análise dos resíduos de inseticidas na polpa e na casca dos frutos de abacaxis Ananas comosus (L.) Merril cultivar Smooth Cayenne. Empregou-se quatro inseticidas: BBC - 2% Rhodiaendrin - CE - 35% (Endrin 25% + Parathion metílico 10%); Endometil - CE - 40% (Endosulfan 30% + Parathion metílico 10%); Tiodan - CE - 35% (Endosulfan) e Testemunha (sem inseticidas) nas dosagens recomendadas pelos fabricantes. Fez-se três experimentos com intervalos de aplicações de 14 em 14, 21 em 21 e 28 em 28 dias. Utilizou-se três blocos cada um com dez parcelas de 36 plantas e as 10 plantas centrais constituíram a parcela útil. A frutificação foi induzida com Carbureto de Cálcio (2 g/planta) em 10/04/1972; em 26/07/1972 fez-se a primeira aplicação dos inseticidas, em 18/10/1972 a última e a colheita em 05/12/1972. Retirou-se a casca até uma profundidade de 2 cm e o resto foi considerado polpa. O material foi mantido em freezer até o momento das análises. Empregou-se o método analítico descrito no Analitical Methods of the J. A. O. A. C. (1970) para resíduos de pesticidas clorados. Para cada amostra de três frutos, tomou-se 50 g da polpa ou casca, homogeneizou-se em "Warring Blendor" com 100 ml de acetonítrilo e 5 g de celite. Filtrou-se por sucção, completou-se o volume para 1.000 ml e extraiu-se o pesticida com 100 ml de éter de petróleo; lavou-se, purificou-se, concentrou-se para 1 ml e fez-se uma clarificação pela passagem em uma coluna cromatográfica contando florisil desativado a 5% com água, eluiu-se em mistura de éter etílico e éter de petróleo, concentrou-se e injetou-se no cromatógrafo marca Becknam - Mod - GC - 4, contendo 10% de DC - 200 em Chromosorb - W e velocidade do papel a 0,508 cm/min. O BHC apresentou resíduos de 1,75 a 2,88 ppm na casca e 0,05 a 0,07 ppm na polpa; Endrin (Rhodiaendrin) na casca, 0,08 ppm e na polpa traços (ppt); Endosulfan (Endometil), apenas na casca, 0,09 a 0,11 ppm e na polpa, também encontrou-se (ppt); Endosulfan (Thiodan), apenas na casca se fez presente com 0,09 a 0,18 ppm. Na polpa, igualmente detectou-se (ppt).
Title in English
Not available
Abstract in English
This research deals with chlorinated insecticides residues BHC - 2%, Endosulphan - EC - 35%, Endosulphan -EC- 30% + Parathion methyl 10% and Endrin- EC- 25% + Parathion methyl 10% in rind and pulp of pineapple fruits Ananas comosus (L.) Merril cv. Smooth cayenne. Three experiments were done at intervals of 14, 21 and 28 days. Each experiment consisted of 3 blocks of lo plots (4 treated and 1 check) of 36 plants being the 10 central ones the useful plot. Fruiting was induced by using Calcium Carbuett (2 g/ plant) in April 10, 1972. The first insecticide application was made in July 26, 1972 and the last was made in October 18, 1972; the fruits were harvested in December 5, 1972. The analysis were done according to the methodology described in Analytical Method J.A.O.A.C. (1970) for residues of chlorinated. From each sample of 3 fruits, 50 g of pulp, or rind, were mixed in a blender with 100 ml of acetonitrile and 5 g of celite. The solution was filtered by suction and the volume completed to 1,000 ml. The pesticide was extracted with 100 ml of petroleum ether, washed, purified and concentrated to 1 ml. Clarification was made in a chromatograf column containing disativated florisil 5% with wather, the material i:as eluted in ethilic ether and petroleum ether concentrated and injected in the chromatograph, column temperature 179C e containing 10% of DC - 200 in chromosorb - W and paper velocity 0.508 cm/min. The standard employed had concentrations of .02 ng/ul for BHC and Endrin, and .2 ng/ul for the Endosulphan. The following results were obtained: BHC residues: 1.75 - 2.88 ppm (rind) and .05 - .07 ppm (pulp); Endrin residues (Rhodiaendrin): .08 ppm (rind) and traces (ppt) in the (pulp); Endosulfan residues (Endometil), in the rind: .09 .11 ppm, and traces (ppt) in pulp; Endosulfan residues (Thiodan), in the rind: .09 - .18 ppm, in the pulp was detected traces (ppt).
 
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Publishing Date
2022-02-07
 
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