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
Pesticide residues in fruits and vegetables.
3、 Performance characteristics
1. 8 channels, capable of simultaneously detecting 8 samples.
2. Full Chinese LCD display, Chinese guided operation.
3. Built in 8GB SD memory card, data can also be uploaded to the computer through the memory card.
4. You can set your own reaction time and qualification criteria. The instrument automatically determines whether the detection result is qualified.
5. It has the ability to automatically save detection results and query saved records.
6. Built in thermal printer, automatically storing and printing test results.
7. Equipped with USB communication interface and network interface, it can be used for both computer operation and independent instrument operation.
8. It has the function of coloring and warning for qualified or unqualified products. The upper computer software includes modules such as pesticide detection, data reading, basic data management, data reports, graphical reports, and data management, which can read, edit, count, manage, query, and print the test results of samples.
4、 Technical parameters
1. Number of channels: 8 channels
2. Wavelength: 410nm ± 2
3. Repeatability: ± 0.1% (A)
4. Stability: photoelectric drift (A) ± 0.002 (3 minutes)
5. Linear error: ± 1.0%
6. Detection range: 0-100%
7. Range of absorbance values: 0.000-3.000
8. Transmission specific gravity repeatability: ≤ 0.3%
9. Repeatability error: absorbance (A) ≤ 0.005
10. Absorbance accuracy: ± 2.0%
11. Repeatability of inhibition rate: 0.5%
12. Detection limit: 0.1~3.0mg/L
13. Environmental temperature: working environment 5 ℃~30 ℃, storage environment -20 ℃~55 ℃
14. Power supply: 220V power supply system
15. Plastic shell: 440mm × 300mm × 160mm
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.
