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. The test results are both qualitative and quantitative, with the qualitative display showing inhibition rate and the quantitative display showing mg/kg.
2. The 7-inch large LCD backlight display screen makes the Android system easy to operate and easy to upgrade.
3. Built in GPS module (built-in, no external antenna required), real-time positioning of longitude and latitude, with an accuracy of less than 5 meters.
4. The instrument is equipped with a built-in thermal sensitive high-speed printer (no need to replace the ribbon) that can print barcode, vegetable name, inhibition rate, pesticide content (quantitative), whether qualified, testing date, testing unit (can be modified on the host), all in Chinese.
5. More than 105 vegetable and fruit names can be set on the instrument host.
6. The instrument undergoes a light source self check when turned on, without the need for manual adjustment with a light blocking block.
7. It can store ≥ 180000 pieces of detection information, with automatic data saving function. After power failure, the stored data is not lost, and it has comprehensive query and statistical functions.
8. The reaction time and upper limit of qualification criteria can be set on the host.
9. Simultaneously measure 16 samples, which can be measured simultaneously or separately. The host is equipped with a micro printer, which can summarize and report pesticide residue data to the agricultural supervision information system.
10. Data query: You can view and delete measurement data by testing date and testing number. It can perform functions such as single deletion, full deletion, printing, forward and backward sorting, sorting by project name, and filtering by date on data.
11. It has voice guidance and broadcasting functions, and can switch between Chinese and English.
12. The host is equipped with standard testing environmental parameters such as air temperature, humidity, dew point, etc. The environmental parameters can be connected simultaneously or separately to the host (optional).
13. Can be remotely connected to update programs without the need to return to the factory.
14. Equipped with RJ45/WIFI/USB interface.
4、 Technical parameters:
1. Number of channels: 16 channels
2. Wavelength: 412nm
3. Display range of inhibition rate: 0-100%
4. Measurement range of inhibition rate: 0-100%
5. Transmission accuracy: ≤ ± 1.5%
6. Transmission specific gravity repeatability: ≤ 0.5%
7. Photocurrent drift: ≤ 0.5% (3 minutes)
8. Pesticide detection limit: 0.1-5mg/kg
9. Repeatability of inhibition rate: ≤ 5%
10. Detection time setting: 0-9min, arbitrary setting
11. Working environment: room temperature 20 ℃, humidity less than 85%
13. Seismic resistance: qualified
5、 Product configuration
Instrument box: host, electronic balance, cuvette, Pipette, power cord, etc.
Medicine box: triangle bottle, Volumetric flask, funnel, measuring cylinder, reaction bottle, aluminum box, bottle washing, 1 set of medicine, etc.
