Method for detecting nitromethane in cosmetics by using gas chromatograph-mass spectrography

Method for detecting nitromethane in cosmetics by using gas chromatograph-mass spectrography

  • CN 102,095,813 A
  • Filed: 11/25/2010
  • Published: 06/15/2011
  • Est. Priority Date: 11/25/2010
  • Status: Active Application
First Claim
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1. gas chromatography-mass spectrography detects the method for the nitre methane in the cosmetics, comprises the steps:

  • Add methyl alcohol to testing sample, ultrasonic Extraction, extract is centrifugal, draw the supernatant drying, the organic system filtering membrane filters, and obtains filtrate and carries out gas chromatography-mass spectrum mensuration;

    The chromatographic column of gas chromatography is the chromatographic column of bonding/crosslinked poly-ethanol stationary phase;

    The chromatographic column adopting temperature programme;

    35 ℃

    keep 3min, and 10 ℃

    /min is warming up to 100 ℃

    of maintenance 2min then, is warming up to 200 ℃

    with 30 ℃

    /min again;

    Split sampling, split ratio are 5;

    1.

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