1,Test Pesticides Residues in Vegetables, fruits, grain, Tea, water, soil etc. 2,Quick test, high accuracy, stable and reliable Technical Principle

Organophosphate and carbamate pesticides could inhibit the activity of acetylcholine enzyme existing in the insect central and peripheral nervous system, thus cause the accumulation of acetylcholine, effecting the normal conduction and making insects die from poisoning. This principle of insect toxicology is applied in the detection of pesticide residues. With reagents added, the spectrophotometer can test absorbance at 410nm, which is changing over time, and then calculate the inhibition rate. Test the degree of organophosphate or carbamate pesticide residue in vegetables according to above data. Namely:

Substrate acetylthiocholine(AsCH) is hydrolyzed into thiocholine and acetic acid at the presence of acetylcholinesterase (AChE). The color reaction is produced based on thiocholine and 3-Carboxy-4-nitrophenyl disulfide (DTNB), leading to the reaction solution turns yellow which shows an absorption peak at 410 nm. Use spectrophotometer to test the inhibitory of organophosphate and carbamate pesticides on enzyme activity to know about the extent of pesticide residues (To represent by inhibition rate), thus determine the harmfulness.

CNH-8I Multi-channel Pesticide Quick Tester could quickly detect the pesticide residues of organophosphate and carbamate in vegetables, fruits, grain, tea, water and soil, and are widely used varied fields, e.g. agricultural inspection center, production bases, farmers markets, supermarkets, schools, health departments, environmental protection departments, hotels, restaurants and so on.

Features and Benefits

Adopt enzyme inhibition method, showing the change values of inhibition rate and the absorbance of tested samples directly.

Excellent electronic components to ensure a stable and reliable performance;resulting in 9 minutes;8-channel test technology to test eight samples simultaneously, one-channel or four-channel also available;Large LCD to results clearly;Up to 200 detection information stored, sound querying and statistic function, switch from instrument data transmission to the computer in real-time to automatically printing.Quick measuring with high precision.using semiconductor light sources and detectors, no moving parts, good , tens of thousands of durabilityHuman-oriented interface, visual display of apparatus operation status and parameters setup, keypad beep, beep alarm.Technical Specifications

Wavelength: 410nm	Standard color developing time: 3 minutes
Rang of inhibition rate :0-100%	Environment temperature: 5~45 °C
The detection limit :0.1~3 .0 mg / L (organic phosphorus and carbamate)	Standard warm-up time: 3 minutes
Zero transmittance drift: ≤ 0.5% / 3min	Operating environment: Indoor / Outdoor / Automobile
Transmittance accuracy: ± 2.0%	Power supply: mains / vehicle  power
Repeatability: ≤ 1.0%	Size: 380 × 240 × 110 mm
Channel error: ± 1.0%	Weight : 7.5kg

Instrument and Accessory

Description	Item
Host	1 unit
1ml Pipette	1 piece
0.1ml Pipette	1 piece
1cm cuvette	16 piece
Tube with plug	16 piece
Reagent (300 times)	1 set

Multi-channel Pesticide Residues Quick Tester