3 results about "Triple quadrupole mass spectrometer" patented technology

The application discloses a method for simultaneously detecting 32 kinds of veterinary drug residues in fecal pollution, and belongs to the technical field of veterinary drug residue detection. The method comprises the following steps: taking a fecal pollution sample, adding Na2EDTA-Mcllvaine buffer solution and acetonitrile for extraction, centrifuging the sample after salting-out to obtain an organic phase, purifying the organic phase through an LPAS purification column, collecting the purified liquid, concentrating and blowing dry, redissolving, filtering, and obtaining a to-be-detected liquid; detecting the to-be-detected liquid by using an ultra-high performance liquid chromatography-triple quadrupole mass spectrometer, gradient elution; and quantitatively detecting 32 kinds of veterinary drugs by using a matrix matching standard curve method. The method is simple in operation and good in purification effect, can effectively remove interfering substances such as fat and protein in the fecal pollution, significantly reduces the matrix effect, is suitable for simultaneously, quickly and accurately detecting 23 kinds of sulfonamides and 9 kinds of fluoroquinolones in pig, chicken, cow and duck fecal pollution, and has good accuracy and precision.

The application discloses a kind of detection methods of smell substance in water, comprising the following steps: (1) using solid phase extraction fiber to the water sample in salting-out treatment is carried out adsorption enrichment;(2) by gas chromatography-quadrupole mass spectrometer to the solid phase extraction fiber of adsorption enrichment after step (1) is carried out thermal desorption, and carries out determination, according to the standard curve of smell substance established in advance, the type and content of smell substance in water are obtained by analysis.The application adopts solid phase headspace microextraction to be combined with gas chromatography-quadrupole mass spectrometer method to simultaneously determine a plurality of smell substances rapidly, utilizes pretreatment (extraction, enrichment), improves chromatographic separation efficiency, and utilizes high sensitivity of triple quadrupole mass spectrometer, improves anti-interference ability, effectively reduces interference, while combining salting-out, solid phase headspace microextraction, simplify the cumbersome steps of sample pretreatment, reduce the detection limit of detection method.

The present application relates to a collision cell and a triple quadrupole mass spectrometer having the collision cell. The collision cell comprises a gas supply unit, a straight section having straight electrodes and a curved section having curved electrodes. The gas supply unit is designed for providing an inert gas for the straight section. The straight section is connected to the gas supply unit by a gas channel for inputting the inert gas provided by the gas supply unit into the straight section. The straight electrodes are independent from the curved electrodes and the curved electrodes are located downstream of the straight electrodes. The straight section is designed such that precursor ions input into the straight section collide with the inert gas under the influence of a first transmission electric field and are thereby fragmented to product ions, which are transmitted to the curved section under the influence of the first transmission electric field. The curved section is designed such that precursor ions and product ions input into the curved section are deflected under the influence of a second transmission electric field and are transmitted through the curved section. The straight section and the curved section are arranged in vacuum chambers separated by a partition wall with an aperture.