A certain concentration of dichlorvos pesticides was sprayed on pakchoi, spinach, and lettuce, and the pesticide residue was measured with a pesticide rapid tester. The darker the pill is, the lower the pesticide residue is. Pills are white and indicate high levels of pesticide residues. Vegetables with high residual pesticides were rapidly treated by fresh water rinse, hot water hot wash, room temperature for 24 hours and refrigerator for 24 hours.
The experiment of pesticide residue using enzyme inhibition method to study the decay cycle of organophosphorus pesticides under different conditions. The results showed that the decay period of the pesticides on vegetables with picked dichlorvos was about 4 days, and the decay period of phoxim was about 5 days. The decay cycle of dichlorvos and phoxim on naturally grown plants was approximately 3 days. After vegetables are washed with plenty of water, the pesticide residue content can reach the national standard. Placed at room temperature or in the refrigerator, pesticides decay slowly. The pigments in green leaf vegetables affect the absorbance measurement, and adding appropriate amount of activated carbon can avoid its influence on the inhibition rate.
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Typical materials used in our manufacturing processes are carbon steel, stainless steel, copper, brass, aluminum and many different types of alloys.
Tight tolerance complex sheet metal fabrications in many cases require machining as a second operation. With our in-house machine shop, vertical CNC machining, turning, threading and grinding provide machine shop capability when required.
Stainless steel weldments and assemblies such as machine guarding, electrical cabinets, water tanks and decorative stainless steel weldments require surface finishing after welding. Our experienced and skilled staff can provide surface finishing and graining that blend the welded area into the grained or polished stainless steel making the welded area disappear.
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