Method for precisely determining ultraviolet absorbent in household product and pretreatment system
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A household product, ultraviolet technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of different and large substrate differences, and achieve the effect of improving accuracy and efficient purification
Inactive Publication Date: 2019-07-26
GUANGDONG TESTING INST OF PROD QUALITY SUPERVISION
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In terms of detection methods, the detection instruments used in coating products and food contact materials and other products are similar, but due to the very large or even completely different substrates, there
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Embodiment 1
[0070] Such as Figure 1-2 As shown, the pretreatment system for precise determination of ultraviolet absorbers in household products provided by this embodiment includes an extraction and purification integrated test tube 1 and a high-efficiency concentration and enrichment device for concentrating the purified liquid in the extraction and purification integrated test tube 1 2 (that is, the high-efficiency concentration and enrichment device 2 is used to concentrate the purified liquid in the integrated extraction and purification test tube 1). The extraction and purification integrated test tube 1 includes a detachably connected extraction tube 11, a purification column 12 and a purification liquid collection tube 13 (before disassembly, it is shown in Figure A in Figure 1, and after disassembly, it is shown in Figure A). figure 1 Middle B figure), described efficient concentration enrichment device 2 comprises test tube rack 21, is located in the chamber 22 in test tube rac...
Embodiment 2
[0086] Instrument and equipment used in the present invention:
[0087] (1) AB 3200QTRAP liquid chromatography-tandem mass spectrometer;
[0093] (1) Acetonitrile, methanol, ethanol, ethyl acetate, and ammonia water used in the sample extraction process were all analytically pure;
[0094] (2) The acetonitrile, methyl alcohol and formic acid used in the mobile phase are chromatographically pure;
[0095] (3) The water used in the detection process is ultrapure water.
[0096] The solvent-based coating is used as the test sample to illustrate:
[0097] 1. Preprocessing steps
[0098] 1.1 Extraction and purification
[0099] (1) Weigh 0.1 g (accurate to 0.0001 g) of the evenly stirred paint sample and place it in the extract...
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Abstract
The invention discloses a method for precisely measuring an ultraviolet absorbent in a household product and a pretreatment system. The method comprises the following steps: placing a household coating product in an extraction tube of an extraction and purification integrated test tube, adding ethyl acetate for dispersion, extracting by using an ammoniation organic reagent, obtaining an extractingsolution by vortex, ultrasonic and centrifugation, purifying by using a purification column, concentrating by using a high-efficiency concentration and enrichment device, dissolving residues by usinga formic acid and methanol-acetonitrile mixed solution, carrying out vortex, filtering, collecting filtrate to obtain a solution to be measured, and detecting by using a liquid chromatography- tandemmass spectrometer. The method has simple and rapid pretreatment, solves the problem of inaccurate qualitative and quantitative determination of the ultraviolet absorbent of the household coating product by adopting a matrix matching method, is suitable for detecting the household coating product, and can also be used as a reference method for detecting the ultraviolet absorbent in other householdproducts. The invention also discloses a pretreatment system, which comprises an extraction and purification integrated test tube and an efficient concentration and enrichment device.
Description
technical field [0001] The invention belongs to the technical field of ultraviolet absorbers, and in particular relates to a method and a pretreatment system for precisely measuring ultraviolet absorbers in household products. Background technique [0002] When industrial products such as plastics, paints, rubber, and synthetic fibers are exposed to sunlight or strong fluorescence, they will trigger their own oxidation reaction due to the absorption of ultraviolet energy, resulting in the degradation of the polymer, resulting in defects in the internal structure of the product. The appearance and physical and mechanical properties deteriorate, this process is called photoaging process. Those that can inhibit the above process are called light stabilizers. Adding a light stabilizer to a polymer material, using it to shield or inhibit photoredox or photoaging, has a very significant effect on preventing the aging of the polymer material and prolonging the service life. [00...
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IPC IPC(8): G01N30/06G01N30/08G01N30/02
CPCG01N30/06G01N30/08G01N30/02G01N2030/062
Inventor 陈满英李锦清唐穗平
Owner GUANGDONG TESTING INST OF PROD QUALITY SUPERVISION
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