Jiuhua Food Safety Portable Pesticide Residue Rapid Tester has good performance and favorable price, and has a good market reputation.

Jiuhua Food Safety
Portable Pesticide Residue Rapid Tester
It is a specially designed instrument based on the national standard method - rapid test card method (paper method). It is mainly used for rapid detection of organophosphorus and carbamate pesticides in fruits, vegetables, tea, grain, water and soil. It is especially suitable for on-site law enforcement use by food safety testing agencies at all levels. In addition, it can also be used in fruit and vegetable tea production bases and farmers' trade. On-site testing at wholesale sales markets, safety tests before processing fruits and vegetables in restaurants, canteens, and households, etc.

Detection principle



The detection principle of the portable pesticide residue rapid tester
is to use the choline in the pesticide residue rapid test card Esterase (white tablet) can catalyze the hydrolysis of indophenol acetate (red tablet) into acetic acid and indophenol. Since organophosphorus and carbamate pesticides have a strong inhibitory effect on the activity of cholinesterase, the catalyzed hydrolysis The color appearance changes. Therefore, based on the difference in color development, it can be determined whether the sample contains organophosphorus or carbamate pesticide residues.


Instrument features


Using a new type of microelectronic heating plate, the entire heating plate is closely connected to the thermally conductive stainless steel plate, so that each channel is heated evenly , small temperature difference, improve measurement accuracy.


The stainless steel plate and main body are injection molded to further prevent heat from dissipating to the external environment, allowing the heat generated by the heating plate to be completely conducted to the stainless steel plate and quickly reach the reaction temperature.


Set up an insulation layer at the bottom of the heating plate to prevent heat from dissipating from the bottom plate, improve sealing and heating efficiency, and effectively shorten the experimental time.


Precautions


Pesticide Residue Rapid Test Card
The detection method is a biochemical reaction, and some physical and chemical factors should be avoided as much as possible factors on enzyme activity.


The optimum pH for the reaction is around . If the sample is too acidic or too alkaline, it should be leached with phosphate buffer.


During the reaction, the surface of the tablets should be kept moist. It is best to add samples uniformly after processing each batch of samples to avoid evaporation to dryness for too long.


Onions, garlic, radish, celery, coriander, wild rice, mushrooms and tomato juice contain plant secondary substances that affect enzyme activity and are prone to false positives. When processing this type of sample, it should not be sheared or crushed, and the extraction time should not be too long to avoid excessive release of liquid and affecting the test results. If necessary, the whole plant (body) vegetable extraction method can be used for determination.


Pesticide quick test card
The validity period is one year under normal temperature conditions. It is required to be stored in a cool, dry and dark place. If possible, it should be placed in a ℃ refrigerator. optimal. It is best to use the pesticide quick test card within three days after opening. If it cannot be used up at one time, it can be stored in a desiccator.

Hubei Jiuhua Food Safety
Specializes in portable pesticide residue rapid testers
It has been in research and development and production for many years. It currently has industry-leading production technology, product performance, high quality, and favorable prices. , has a good reputation in the market and is favored by the majority of users. Jiuhua Food Safety Portable Pesticide Residue Rapid Tester
, the best choice for users and agents!


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