A kind of deactivated aluminum oxide and its preparation method, the method for qualitative/quantitative analysis of short-chain chlorinated paraffins

Abstract

This application discloses a method for deactivating aluminum oxide that can degrade short-chain chlorinated paraffins, and ionization source low-resolution mass spectrometry for qualitative / quantitative analysis of short-chain chlorinated paraffins. The water content of the deactivated aluminum oxide is 0.02 -1 wt%. The deactivated aluminum oxide described in this application can be used for the degradation of SCCPs, and the low-resolution mass spectrometry of the ionization source can be used for the qualitative / quantitative analysis of trace short-chain chlorinated paraffins.

Description

technical field [0001] The application relates to an inactivated aluminum oxide and a preparation method thereof, and a method for qualitatively / quantitatively analyzing short-chain chlorinated paraffins, belonging to the field of environmental sample processing. Background technique [0002] Short-chain chlorinated paraffins (SCCPs) are industrial products of straight-chain chlorinated alkanes with a chain length of 10-13 carbon atoms, and there are tens of thousands of similar substances. Similar to persistent organic pollutants (POPs), they are chemically stable, have long-distance migration and bioaccumulation capabilities, and are detected in the atmosphere, water, sediment and biological communities, and even human food and tissues. SCCPs have obvious acute toxicity to aquatic organisms and potential carcinogenicity, which has attracted widespread attention from the international community. The POPs Review Committee of the Stockholm Convention intends to list SCCPs as ...

AI Technical Summary

Problems solved by technology

[0005] Due to the limitation of the ionization principle of the ion source, ECNI-MS has no response to low-chlorinated CPs monomers with less than 5 chlorine atoms. As the most commonly used ionization method, there is no low-chlorinated CPs monomer in electron impact (EI) ion source. The problem of monomer response discrimination, but because the EI bombardment energy is too high, SCCPs undergo a variety of fragmentation reactions during the ionization process, resulting in a large number of ion fragments, which are very complex, and the m / z is small, lacking characteristics, and difficult to distinguish, so Usually not used for detection of SCCPs

At present, using the commonly used electron bombardment ion source low-resolution mass spectrometry (EI-HLMS), the qualitative and quantitative selection of universal ions for SCCPs has not been reported.

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