Name: FT-CY12 Tea Pesticide Residue Detector
Brand: Fengtu
Specifications: FT-CY12
Application scope: Detection of pesticide residues in tea leaves

FT-CY12 Tea

Main parameters:
1. With the continuous improvement of people's living standards, the market has become increasingly strict in controlling tea. In response to the current situation, our company specializes in developing and producing a pesticide residue rapid testing instrument specifically for tea; Targeting tea farmers, tea merchants, and tea enterprises for use.
In addition, it can also be used for on-site testing in fruit and vegetable tea production bases and agricultural wholesale sales markets, as well as safety speed testing before fruit and vegetable processing in restaurants, schools, canteens, and households.
2. Detection channels: 6/12 detection channels, capable of testing multiple samples simultaneously. Each sample is controlled by a program to work independently without interfering with each other.
3. Display mode: ≥ 7-inch LCD touch screen display, user-friendly Chinese operation interface, intuitive and simple reading.
4. Equipped with an embedded high-speed thermal printer, it can choose to print manually or automatically, and the printing result can be obtained in three minutes.
5. The light source adopts imported ultra high brightness light-emitting diodes, which have the advantages of low power consumption, strong stability, high sensitivity, high detection accuracy, high repeatability accuracy, controllable light source, and fast response speed.
6. Adopting standard USB interface design, no driver installation, convenient data storage and movement, and can be directly connected to a computer at any time, and the instrument can be controlled by a computer. Implement data query, browsing, analysis, statistics, printing, etc.
7. High degree of intelligence, the instrument has self checking function: it has power on self checking and zero adjustment functions, and has automatic detection of repeatability function
8. Built in powerful database allows for direct selection of sample names, detection indicators, and inspection units on the instrument, as well as direct editing and input of sample names, detection indicators, inspection units, and other information into the sample database.
9. Support Wifi network, data can be uploaded on LAN and Internet, and the test results can be directly transmitted to the food safety supervision platform. Conduct regional food safety supervision and big data analysis processing, detect the long-term and short-term dynamics of regional food safety, and achieve food safety problem estimation and early warning
8. Technical parameters;
Wavelength configuration: 410nm;
Inhibition rate display range: 0% to 100%;
Inhibition rate measurement range: 0% to 100%;
Transmittance accuracy: ± 1.5%;
Transmission density repeatability: ≤ 0.5%;
Drift: ≤ 0.005Abs/3min;
Inhibition rate indication error: ≤ 10%
Inhibition rate repeatability: ≤ 5%
1. The main control chip adopts a 32-bit processor, which runs faster and has strong stability.
3. DC 12V power supply, can be connected to car power supply.
5. Automatic adjustment and calibration of light source brightness
6. Pulse type constant current drive to avoid light decay and temperature drift caused by continuous light emission.
8. Password login can be set
9. Continuous injection and testing
8. Sample numbers are automatically accumulated.
10. The testing items can be expanded.
11. The test results can be printed and uploaded in batches.
12. The test results are in an Excel spreadsheet, which can be copied by connecting to a computer.
13. Storage capacity for 200000 test results
17. Firmware upgradable
9. Optional features
1) Data can be wirelessly transmitted to a mobile phone or designated network through the GPRS module.
2) 5-inch touch screen or 7-inch touch screen, the instrument defaults to a 5-inch screen.
3) Instrument with self heating function
4) Configurable large capacity lithium battery
Pesticide residue (tea) detection reagent user manual
[Introduction]
Pesticide residues, It is a general term for trace pesticide precursors, toxic metabolites, degradation products, and impurities that remain in organisms, crops, soil, water bodies, and the atmosphere after a period of pesticide use without being decomposed. Pesticides applied to crops, some of which adhere to the crops, while others are scattered in the soil, atmosphere, and water environment. Some of the remaining pesticides in the environment will be absorbed by plants. Residual pesticides are directly transmitted to humans and livestock through plant fruits, water, and the atmosphere, or ultimately transmitted to humans and livestock through the environment and food chain. The main cause of excessive pesticide residues in vegetables is the prohibition of the use of organophosphate pesticides and carbamate pesticides in vegetable production by some countries, such as Methamidophos, Omethoate, Methamidophos, Parathion, Methyl Parathion, etc. Consuming food containing a large amount of highly toxic and highly toxic pesticide residues can lead to acute poisoning accidents in humans and animals. Long term consumption of agricultural and sideline products with excessive pesticide residues may not lead to acute poisoning, but it may cause chronic poisoning in humans and animals, leading to the occurrence of diseases, inducing cancer, and even affecting the next generation.
【 Detection Principle 】
According to the national standard GB/T5009.199-2003, organophosphate or carbamate pesticides have inhibitory effects on acetylcholinesterase, thereby affecting the color reaction between acetylcholinesterase, thioacetylcholine (as substrate), and dithiodinitrobenzoic acid (as color reagent). The pesticide residue in the sample can be calculated based on the depth of the solution color after the reaction; If the degree of inhibition of acetylcholinesterase is more severe, the amount of yellow compounds generated by the reaction is also less, indicating that there are more pesticide residues in the test sample, and vice versa; The generated yellow substance has a unique absorption peak at 412 nm, which can be used for quantitative determination of organophosphorus or carbamate pesticides in the sample.
The detection results are expressed in terms of the degree of inhibition (inhibition rate) of acetylcholinesterase, and the calculation formula is: inhibition rate (%)=(Δ Ac - Δ As)/Δ Ac × 100%; In the formula, Δ Ac represents the difference in absorbance values between the control group 3 minutes later and 3 minutes ago; Δ A s is the difference between the absorbance values of the sample group after 3 minutes and before 3 minutes.
[Object of Detection]
Vegetables, fruits, tea, grains, meat, eggs, milk, aquatic products, etc.
Technical indicators
Detection limit: 1% (inhibition rate)
Detection range: 0-100% (inhibition rate)
Packaging times: 250 times
[Production Date]
Production date: See outer packaging.
【 Shelf life 】
Shelf life: 12 months.
[Reagent Preparation]
① Buffer solution: Pour out the reagent from the buffer reagent bag and dissolve it in 500ml distilled water. Dissolve and mix well.
② Substrate: Add 10ml of distilled water to the bottle labeled as substrate. Refrigerate and store at 0-5oC environment.
③ Color reagent: Add 10ml of buffer solution to the bottle labeled as color reagent. Refrigerate and store at 0-5oC environment.
④ Enzyme reagent: Add 10ml of buffer solution to the bottle labeled as enzyme reagent. Normally, it should be stored in a refrigerated environment at 0-5oC.
When the above reagents are not in use, they should be stored refrigerated at 0-5oC; When in use, take it out of the refrigerator and place it at room temperature for testing.
[Operation Method]
1) Blank control test:
Take a colorimetric bottle and use the corresponding pipette to aspirate the corresponding reagent,
And add it to the colorimetric bottle in the following order:
Shake the colorimetric bottle about 5 times and pour it into the colorimetric dish. Place the colorimetric dish into the designated channel, click the "Compare" button, and the tablet will display the comparison value.

2) Sample testing:
A Fresh tea: Weigh 2.0g of sample (size 1cm square) and place it in a sample cup. Add 0.5mL of extraction solution and 10mL of buffer solution, shake and extract for 2 minutes; Filtering, the filtrate is the sample extraction solution.
B dried tea: Weigh 0.5g of tea sample, add 5mL of acetone, shake and extract for 5 minutes; Take 0.2mL of the above acetone solution and evaporate it in a water bath at 40-50 ℃; Add 2.5mL of buffer solution and shake for 2 minutes; Filtering, the filtrate is the sample extraction solution. (Bring your own acetone)
Take another colorimetric bottle, use the corresponding pipette to aspirate the corresponding reagent, and add it to the colorimetric bottle in the following order:
Shake the colorimetric bottle about 5 times and pour it into the colorimetric dish. Place the colorimetric dish into the designated channel, click the "Sample" button, and the tablet will display the sample results.

[Execution Standards]
① According to the national standard GB/T5009.199-2003, a sample with an inhibition rate of 40% or less is considered a qualified sample, while a sample with an inhibition rate between 40% and 50% is considered a suspected pesticide residue exceeding the standard sample;
② If the inhibition rate is greater than 50%, it indicates that the pesticide residue toxicity of the tested sample may exceed the safety threshold. It is recommended to use instrument analysis methods such as gas chromatography for further confirmation.

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