A direct and accurate detection method for aziridine residues in light industrial products
A technology of light industrial products and detection methods, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of difficult control, cumbersome derivation process, and inability to eliminate interference well, and achieve improved accuracy, strong anti-interference ability, The effect of improving detection accuracy
Inactive Publication Date: 2018-08-07
SICHUAN ENTRY EXIT INSPECTION & QUARANTINE BUREAU INSPECTION & QUARANTINE TECHN CENT
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Problems solved by technology
However, the derivation process of the above two methods is cumbersome and difficult to control, and the interference cannot be well eliminated during the instrumental analysis process.
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Embodiment 1
[0037] Embodiment 1: Determination of the rapid detection method of aziridine residue in light industrial products
[0038] (1) Preparation of the sample liquid to be tested: Cut the light industrial product sample to be tested into pieces of the sample to be tested with a size of 5mm×5mm×5mm or less, weigh 2g of the sample to be tested and soak it in 20mL of isooctane, and put it under the condition of 40℃ Next, vibrate with a circular oscillator, the oscillation frequency is 150r / min~200r / min, treat for 40min~60min, extract the aziridine in the test sample particles with isooctane, and obtain the aziridine extract of isooctane. The extract was concentrated to 0.2 mL by a rotary evaporator, mixed with 1.0 mL of isooctane and dissolved, then filtered through a 0.45 μm filter membrane into a chromatographic sampling bottle to obtain a sample solution for the detection of aziridine.
[0039] (2) Set the instrument working parameters for gas chromatography-mass spectrometer analy...
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And a method for directly determining the original substance of aziridine with a gas chromatography-mass spectrometry instrument. The steps include: (1) Soak the sample in isooctane at 40°C, vibrate with a circular oscillator to promote the dissolution of aziridine in isooctane, concentrate the extract, and then dissolve it in isooctane , use a filter membrane to filter into the chromatographic sample bottle to obtain the sample solution for the detection of aziridine; (2) put the sample solution of aziridine into the sample tray of the instrument and pass it through the autosampler , automatic sample injection analysis, and obtain the chromatogram and mass spectrum of aziridine; when setting the temperature of the instrument's working parameters, it is optimized by segment and time, which improves the anti-interference. Advantages: use isooctane to dissolve and remove aziridine from light industrial products, until the aziridine is detected by gas chromatography, the aziridine remains unchanged, so that aziridine can be directly detected to realize the detection For the detection of propidine residues, the detection accuracy can reach more than 95%.
Description
technical field [0001] The invention relates to the determination of aziridine residues in light industrial products (bamboo mat products, leather products, textiles, etc.), in particular to a method for directly determining aziridine original substances with a gas chromatography-mass spectrometry instrument. Background technique [0002] Ethyleneimine (Ethyleneimine) is a highly reactive three-membered nitrogen heterocyclic ring, and the main reactions include ring-opening reaction and polymerization reaction. In aziridine and its derivatives, due to the high reactivity of the aziridine ring, it has been widely used as an active intermediate in organic synthesis. Its application has involved many fields of national economy and people's livelihood, such as leather industry, textile industry, Bamboo and wood processing industry, paper industry, plastics processing industry, petroleum exploration, medicine and agriculture, etc. For example, in the leather industry, aziridine ...
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IPC IPC(8): G01N30/02
Inventor 俞凌云吴孟茹苟圆庞晓红董伟
Owner SICHUAN ENTRY EXIT INSPECTION & QUARANTINE BUREAU INSPECTION & QUARANTINE TECHN CENT