Features: 1, with light calibration function 2, test results query function 3, can detect the absorbance of the test solution, transmittance 4, safe concentration, the standard concentration according to need to set their own; 5, can effectively solve the false positive detection of ginger and garlic problems. Test items: 1, Phosphorus carbamate insecticide pesticide residues; 2, the United States and the United States double, methyl thiophanate fungicide pesticide residues; 3, nitrate, nitrite; 4, heavy metals and arsenic. Technical Parameters: 1, Stability: Photocurrent caused by changes in optical transmittance within 5 minutes does not exceed 0.4% change in value or absorbance does not exceed 0.005; 2, Sensitivity: For potassium dichromate standard solution Kλ ≥ 3.4 × 10-3 3, linear error: 0.1 ~ 0.3 ≤ ± 4.0%; 0.3 ~ 0.6 ≤ ± 2.5% 0.6 to 0.8 ≦ ± 3.0% 4, Repeatability error: Absorbance change △ A ≤ 0.003 5, the number of channels: 2 6, light source: two channels for each light source, respectively, red, blue 7, power ≤ 5W 8, pesticide testing: inhibition rate accuracy: ± 20% inhibition rate repeatability: 5% 9, safety standard setting range: 0-99 10, detection limit: nitrite: 0.02mg / L methamidophos 0.3mg / L trichlorfon 0.05mg / L Carbofuran 0.01 mg / L omethoate 1.5 mg / L
Features: 1, with light calibration function 2, test results query function 3, can detect the absorbance of the test solution, transmittance 4, safe concentration, the standard concentration according to need to set their own; 5, can effectively solve the false positive detection of ginger and garlic problems. Test items: 1, Phosphorus carbamate insecticide pesticide residues; 2, the United States and the United States double, methyl thiophanate fungicide pesticide residues; 3, nitrate, nitrite; 4, heavy metals and arsenic.
