1、 Product Principles
According to the insect toxicology principle that organophosphorus and carbamate pesticides can inhibit the activity of Acetylcholine enzyme in the central and Peripheral nervous system of insects, cause the accumulation of nerve conduction medium Acetylcholine, affect normal transmission, and make insects poisoned to death, it is used in the detection of pesticide residues. If the vegetable extract does not contain organophosphorus or carbamate pesticides or the residue is low, the enzyme activity will not be inhibited, the substrate added in the test will be hydrolyzed by Enzymatic hydrolysis, and the hydrolysate will react with the added developer to produce color. On the contrary, if the vegetable extract contains a certain amount of organic phosphorus or carbamate pesticide enzyme activity will be inhibited or partially inhibited, the substrate added in the test will not be hydrolyzed by Enzymatic hydrolysis or a small part will be hydrolyzed, so there will be no color development or little color change. Use a spectrophotometer to measure the change of absorbance value with time to calculate the inhibition rate, Then we can judge whether there are organophosphorus or carbamate pesticide residues in vegetables.
2、 Test items
It is used for rapid detection of organophosphorus and carbamate pesticide residues in vegetables, fruits, grains and tea.
3、 Performance characteristics
1. 10 channels. Can detect 10 samples simultaneously. Each channel is controlled by a program and operates independently without interfering with each other.
2. 5.0 inch large LCD Chinese display, Chinese guided operation.
3. Built in large capacity rechargeable battery, it can work continuously for 4 hours without external power supply.
4. Adopting a USB interface design, it facilitates the storage and movement of data, and can be directly connected to a computer at any time, achieving data query, browsing, analysis, statistics, printing, and publishing information.
5. Instrument automatic diagnosis system malfunction.
6. Built in micro thermal printer, automatically saves detection results and can print detection results in real time.
4、 Technical parameters
1. 10 detection channels
2. Wavelength: 410nm
3. Repeatability: ± 0.1% (A)
4. Absorbance accuracy: ± 2.0%
5. Linear error: ± 1.0%
6. Detection range: 0-100%
7. Lower detection limit: 0.1-3.0mg/L
8. Working environment: room temperature 20 ℃, humidity less than 85%
9. Seismic resistance: qualified
5、 Product configuration
Instrument box: host, electronic balance, cuvette, communication software, communication line, Pipette, power line, etc.
Medicine box: triangle bottle, Volumetric flask, funnel, measuring cylinder, reaction bottle, aluminum box, bottle washing, 1 set of medicine, etc.
