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Applications:

To detect the pesticide residues of organophosphate and carbamates in vegetables, fruits, grain, tea, water and soil.

Organophosphate and carbamate pesticides could inhibit the activity of acetylcholine enzyme existing in the insect central and peripheral nervous system, cause the accumulation of acetylcholine, and effect the normal conduction; so that make insect die from poisoning. The principle of this insect toxicology is used in the detection of pesticide residues. After adding reagent, we can determine the changing value of absorbance with time at 410nm using spectrophotometer, calculate the inhibition rate, and estimate the degree of organophosphate or carbamate pesticide residue in vegetables. Namely:

Substrate acetylthiocholine(AsCH) is hydrolyzed into thiocholine and acetic acid choline　 at the presence of acetylcholinesterase (AChE). The color reaction is produced based on thio-choline 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 estimate the inhibitory extent 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.

1.Wavelength: 410±2nm

2.Standard color developing time: 3 minutes

3.Rang of inhibition rate :0-100%

4.Environment temperature: 5~45 ℃

5.The detection limit :0.1~3 .0 mg / L (organic phosphorus and carbamate)

6.Standard warm-up time: 3 minutes

7.Zero transmittance drift: ≤ 0.5% / 3min

8.Photocurrent drift: ≤ 0.5% / 3min

9.Operating environment: Indoor / Outdoor / Automobile

10.Transmittance accuracy: ± 1.5%

11.Power supply: mains / car power

12.Repeatability: ≤ 1.0%

13.Channel error: ± 1.0%

14.Size: 380 × 240 × 110 mm

15.Weight: 7.5kg

1.Test methods - enzyme inhibition method

2.Conform to GB / T 5009.199-2003 and NY/448-2001

3.Quick test, high accuracy, stable and reliable.

4.Integral high speed printer

5.8-channel testing technology

6.Large LCD screen display

7.Data logger-automatic data storage of 2000 results

8.Connects to different types of pc

9.Human-oriented interface

10.Intuitive display of apparatus operation status and setting parameters

11.Keypad beep and Beep alarm