2 results about "Quadrupole" patented technology

The invention belongs to the field of analytical chemistry and particularly relates to a detecting method for determining various neurotransmitters on the basis of in situ derivation. The method is characterized in that 4'-carbonyl chloride-rhodamine is used as the derivative reagent for the first time, the ultrasonic assistance-in situ derivation-dispersive liquid-liquid microextraction technology is used to derive amino acid and monoamine neurotransmitters, and the ultra-high performance liquid chromatography triple quadrupoles tandem mass spectrum with multiple reaction monitoring modes is used to perform qualitative and quantitative detection; three internal standard substances (isoprenaline, 5-ketoindole-2-carboxylic acid and norleucine) are used for building the linear equations of the neurotransmitters of three chemical structures; the existence of the neurotransmitters is accurately determined by quantification through an internal standard method. The detecting method is simple, fast, high in sensitivity, good in selectivity, good in recovery rate, capable of fast and accurately determining the neurotransmitters, and the like.

The invention discloses a method for detecting alkaline colorants in livestock meat products. The method for detecting the alkaline colorants in the livestock meat products comprises the steps that extraction of samples to be detected is carried out by using an extraction solution, a liquid supernatant obtained after extraction is purified by a WCX solid-phase extraction column to complete samplepretreatment, and then, the detection method for simultaneously screening and confirming the seven alkaline colorants in the livestock meat products is established by using an ultra-high efficient liquid chromatography-series connection quadrupole rod linear ion trap mass spectrometer. The method for detecting the alkaline colorants in the livestock meat products has the characteristics of simpleoperation, efficient flux, qualitative accuracy, high sensitivity, friendly environment and the like, is suitable for screening and confirming the various alkaline colorants in the meat products, andavoids detection of false positive samples.