A kind of acetamiprid detection device and method for detecting acetamiprid
A detection device, acetamiprid technology, applied in the field of chemical analysis, can solve the problem that the detection method cannot be visualized
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[0046] The preparation process of the ionic liquid polymer-coated glass capillary: the two ends of the glass capillary are burnt and sealed. Then wash with distilled water and immerse in silver ammonium ion solution (concentration range 2%-5%), form microstructure silver layer by silver mirror reaction, the length of silver layer is about 0.8mm;
[0047] After drying at room temperature, immerse in ethanol solution of 1,8-octanedithiol (10-30mmol·L -1 ) for 12h to form a self-assembled monolayer dithiol;
[0048] Then, immerse the end of the glass capillary obtained in the previous step into a solution containing 0.1-0.3g VOIm + NapSO 3 - and 0.002-0.004g azobisisobutyronitrile in 30mL chloroform solution; after purging with nitrogen for 10 minutes, under nitrogen atmosphere, the system was reacted at 50-100°C for 12-24h; the ionic liquid was on the surface of the glass capillary In situ polymerization forms positively charged ionic liquid polymers; the surface coating of ...
Embodiment 2
[0057] An acetamiprid detection device for specifically recognizing and detecting acetamiprid, the steps are as follows:
[0058] 1. Preparation of positively charged ionic liquid polymer modified glass capillary
[0059] (1) Ionic liquid polymer VOIm + NapSO 3 - preparation of
[0060] The aqueous solution of 1-vinyl-3-octyl imidazolium bromide and β-naphthalene sulfonate sodium with a charge ratio of 1:1 was mixed and stirred overnight at room temperature; after the reaction, the hydrophobic target VOIm + NapSO 3 - Precipitate from aqueous solution;
[0061] An equal volume of chloroform was added to the above aqueous mixture to extract the target; after the layers were separated, the chloroform was separated and washed several times with fresh deionized water (1:1, v / v) to remove Br in the product - , until no Br was detected in the aqueous phase - ;
[0062] Then, the chloroform layer was collected and removed by vacuum distillation; the resulting product was puri...
Embodiment 3
[0070] Detection of acetamiprid
[0071] Prepare a series of acetamiprid standard solutions (0.05-2.0 mg / L concentration), and then insert the glass capillary into the acetamiprid solution for 10 minutes. Take it out, and observe the fluorescence intensity under ultraviolet light, such as Figure 4 , using matlab software to convert the brightness value of the picture into a gray value, and obtain a linear regression curve ( Figure 5 ), the linear equation is y=131.82x+22.08, wherein, x is the concentration (mg / L), and y is the fluorescence intensity, according to the calculation formula LOD=3N / S (N is the gray value of blank sample, S is the slope of the calibration curve), and the detection limit of acetamiprid is 0.02mg / L.
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