EFFECT OF LEAF TYPE, LEAF INJURY, STORAGE TEMPERATURE AND WASHING SOLUTION ON ETHYLENETHIOUREA RESIDUES OF CARBAMATE‐TREATED CANNED SPINACH.¹

Abstract

Ethylenethiourea (ETU) residue originating from ethylenebisdithiocarbamate (EBDC) fungicides sprayed in the jield was evaluated in canned spinach. The effect of leaf type, mechanical injury, holding temperature and washing solution on levels of ETU were studied. A smooth leaf cultivar had lower ETU residues than savoy and semisavoy. Leaf-injured spinach had higher ETU residues than the intact control. Spinach washed in water reduced the ETU level to less than 5 ppm, while addition of sodium hypochlorite (300 ppm) and a basic detergent (0.1%) further reduced ETU levels to less than 1 ppm. Increasing the washing time from 1 to 3 min did not significantly reduce the residual ETU levels. High holding temperatures (21°C) resulted in canned spinach with low but not significantly direrent levels of ETU as compared to low temperatures (2°C).

Reduction in phosalone residue levels during industrial dehydration of apples

“…The principal stages responsible for this positive effect are the washing and the filtering. These results are in accord with the observations of Gonzalez et al (1989) and Montlahuc et al (1992). Either the phosalone was partially dissolved and eliminated by the water during washing; or it was eliminated by the filtration process, appearing in the waste product.…”

Efeito De Soluções De Enxágue Na Remoção De Resíduos De Mancozeb Em Tomates De Mesa

“…Para remoção dos resíduos de agrotóxicos, alguns tratamentos têm sido estudados, dentre eles soluções ácidas, soluções básicas, água ozonizada, nanofiltração, condições climáticas, combinação de oxidação e tratamento biológico, métodos enzimáticos e zeólitas (Gonzalez et al 1988, Fay et al 2004, Lemic et al 2006, Wu et al 2007.…”