In recent years, the quality and safety of tea has attracted more and attention. Pesticide residues exceeding the standard occur from time to time, and tea exported to the EU are frequently notified of exceeding the standard.

Pesticides are used to prevent pests and diseases during tea planting. With the extensive use of pesticides, the negative effects of excessive, unreasonable or even abused pesticide residues on human health, the ecological environment and foreign trade are becoming increasingly apparent.

At present, the detection methods for pesticide residues in tea mainly include liquid phase, gas phase, and ultra-high performance liquid chromatography-tandem mass spectrometry.
Although these methods have high detection sensitivity and accuracy, it is difficult to popularize them at the grassroots level by using large chromatographic instruments, which is not conducive to large-scale monitoring.
The enzyme inhibition method used for rapid on-site screening of pesticide residues is mainly used for the detection of organophosphorus and carbamate pesticide residues, which is highly interfered by the matrix and has a high false positive rate.

Kwinbon's colloidal gold detection card adopts the principle of competitive inhibition immunochromatography.
The drug residues in the sample are extracted and combined with the colloidal gold-labeled specific antibody to inhibit the combination of the antibody and the antigen on the test line (T line) in the test strip, resulting in a change in the color of the test line.
The pesticide residues in the samples are qualitatively determined by comparing the color depth of the detection line and the control line (C line) by visual inspection or instrument interpretation.

The portable food safety analyzer is an intelligent instrument based on measurement, control and embedded system technologies.

It is characterized by easy operation, high detection sensitivity, high speed and good stability, matching the corresponding rapid detection strip, can help users in the field quickly and accurately detect pesticide residues in tea.




Post time: Aug-02-2023