Matrix dispersion purification tube for phthalate ester detection

Abstract

The invention provides a matrix dispersion purification tube for phthalate ester detection, and relates to development of a pretreatment purification tube for detecting various phthalate esters in different matrixes. A purification process of the tube comprises: (1) based on different matrixes, placing a filler in an empty purification tube according to a ratio regulated by a requirement; (2) selecting appropriate extraction solvents to extracted various phthalate esters according to the different matrixes; (3) pouring the extracted phthalate ester solutions into an extraction tube; and (4) after completely mixing, purifying the filler, removing interferents, centrifugating for 5 min at a speed of 4000 r / min, taking the supernatant, and analyzing. With the matrix dispersion purification tube, the phthalate esters in various matrixes can be rapidly and cheaply purified, characteristics of economy, environmental protection and stability are provided, GPC instrument purification is not required, and analysis accuracy and no damage on the instrument are ensured.

Description

Technical field: [0001] The invention relates to the development of a pretreatment purification tube for detecting various phthalate esters in different matrices, in particular to a matrix dispersion purification tube for detecting phthalate esters. Background technique: [0002] Phthalates are chemical products that are widely used in the plastics industry, packaging materials, pharmaceutical auxiliary materials and other industries. At the same time, phthalates are environmental hormones. If they exceed a certain level in food and drinking water, Concentrations will affect the fertility of men and the development of women, so the European Union has long introduced limits for phthalates in food, drinking water, and toys for infants and young children. [0003] China issued GB / T 21911-2008-Method for the determination of phthalates in foods in 2008, especially for the detection of phthalates in oily substances, the pre-treatment method uses GPC to remove oil However, the GPC instr...

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Problems solved by technology

[0003] In 2008, my country released GB / T 21911-2008-Methods for the determination of phthalates in food, especially for the detection of phthalates in oily substances. The pretreatment method uses GPC to remove oils interference, but GPC instruments are expensive, the general price of imported ones is more than one million, and domestic ones generally cost more than 700,000, and the operating cost is high, requiring a large amount of reagents, because the purification by GPC generally needs to be concentrated 50 times, so The requirements for the selection of reagents are also very high. Generally, imported pesticide-grade reagents are required, which are expensive. A GPC instrument can only process one sample at a time, and it takes more than 30 minutes to process a sample at the fastest.