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Method for the determination of total components of o-phenylphenol and methrin in insecticides


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O-phenylphenol, methrin, etc. in insecticides

7 total component analysis method

FID detector and

HP-1 capillary column

Analysis and quantification of o-phenylphenol, repellent ester, dextromethrin, propymethrin, acetylidene, methrin and cypermethrin with dibutyl phthalate as internal standard . The linear correlation coefficients were 0.9988, 0.9994, 0.9999, 0.9999, 0.9999, 1.0000, and 0.9993, respectively. The standard deviations were 0.01, 0.04, 0.007, 0.005, 0.01, 0.009, and 0.02, respectively. The coefficients of variation were 5.3%, 0.84%, and 6.4%, respectively. 4.2%, 8.3%, 2.7%, 8.5%, the average recovery rate is between 99.81% and 100.61%. Key words: gas chromatography; capillary column; multi-component determination; insecticide hygiene insecticide products have been rapidly developed in recent years, there are more than 40 manufacturers in Shanghai, and the products involved are also diverse. The quality analysis methods of various products are different in different manufacturers, and the analytical methods published are rare. In order to quickly and accurately detect the product, judge the quality of the sanitary insecticide, and shorten the analysis time, our unit selects o-phenylphenol, mosquito repellent, and dextromethrin in combination with the active ingredients and compounding conditions in the products on the market. As an analytical object, seven kinds of commonly used insecticidal active ingredients of propargyl, methyrin, methicillin, methrin and cypermethrin were used to analyze the separation and determination by gas chromatography. Since the same product cannot contain the above seven active ingredients at the same time, this method can be used to firstly screen and then perform qualitative analysis, and the operating conditions can be appropriately adjusted to achieve the best separation effect. 2 Experimental part 2.1 Instrument Agilent 6890 gas chromatograph with hydrogen flame ionization detector (with workstation); column: HP-1 (30m × 0.32mm × 0.25μm) quartz capillary column.

7 groups of o-phenylphenol, methrin, etc. in insecticides

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