working principle

Enzyme inhibition principle: Organophosphorus and carbamate pesticides have inhibitory effects on the normal function of cholinesterase. Under normal circumstances, acetylcholinesterase can catalyze the hydrolysis of nerve conduction metabolites, which react with chromogens to produce yellow substances. When there are pesticide residues, the pesticide inhibits the activity of cholinesterase, resulting in a decrease in hydrolysis products and a lighter color in the color reaction.

Photoelectric colorimetric method: The suppression rate is calculated by measuring the change in absorbance over time at a specific wavelength using a spectrophotometer. The inhibition rate is positively correlated with the concentration of pesticides, and the inhibition rate can be used to determine whether there are residues of organophosphorus or carbamate pesticides in the sample.

Pesticide residue analyzerAdvantages:

Quick detection: can obtain detection results within a few minutes, improving detection efficiency.

Easy to operate: The instrument design is user-friendly, and the operation process is simple and easy to understand.

On site applicability: Small size, light weight, easy to carry for outdoor operations.

Accurate data: Enzyme inhibition principle and photoelectric colorimetric method are used to ensure the accuracy of measurement results.

局限性：

Limited detection range: mainly detecting organophosphorus and carbamate pesticides, with weaker detection ability for other types of pesticides.

Accuracy is affected: the detection limit is relatively high, but the accuracy is relatively low.

Strict storage requirements for reagents: Some reagents need to be refrigerated and stored in the refrigerator, which increases the cost of use.