33results about How to "Meet Residue Analysis Requirements" patented technology

The invention provides an analyzing method for simultaneously determining residues of organophosphorus pesticides and pyrethriods pesticides in soil. The analyzing method is characterized by comprising the following steps: carrying out ultrasonic extraction on a soil test sample by using an acetonitrile solution containing 1% of acetic acid by volume percent; purifying by using a suitable amount of PSA and C18 mixed fillers; blowing liquid supernatant by nitrogen and concentrating until the liquid supernatant is nearly dried; respectively dissolving by acetone and n-hexane and enabling the volume to be constant; raising the temperature by using DB-1701 and HP-5 quartz capillary columns and separating; carrying out GC / FPD (Gas Chromatograph / Flame Photometric Detector) detection and GC / micro ECD (Electron Capture Detector) detection; and finally, quantifying by using a base material external standard method. A test confirms that the method has a wide linear range; the technical indexes including detection sensitivity, accuracy and precision meet the requirements of a residue analysis; the pre-treatment operation is simple, convenient and rapid and a reliable manner is provided for analytical researches for simultaneously determining the residues of ths pesticides and the pyrethriods pesticides in the soil.e organophosphoru.

The invention discloses a method for determining seven indoxacarb degradation products in tea leaves and tea soup based on ultra-high performance liquid chromatography tandem mass spectrometry, and belongs to the technical field of tea pesticide residue detection. The present invention includes: 1) sample extraction and purification: for fresh leaves or tea samples, acetonitrile / water extraction, C 18 Purification with GCB dispersive solid phase extraction, concentrated methanol / water to volume; or 1) PRP-SPE column enrichment and purification for tea soup samples, methanol elution and reception, concentrated methanol / water to volume; 2) C-Use 2. Chromatographic column separation and ultra-high performance liquid chromatography tandem mass spectrometry to detect 7 indoxacarb degradation products; 3) Calculate the standard curve and linear correlation coefficient of indoxacarb degradation products; 4) Calculate the addition recovery, relative standard deviation, and method detection limits and limits of quantitation. The method of the invention satisfies the requirements of residue analysis, and can provide an analysis method for the research and detection of seven indoxacarb degradation products in fresh tea leaves, tea leaves and tea soup.

The invention provides a quantitative determination method for organophosphorus pesticides in fresh tea leaves. The quantitative determination method is characterized by comprising the following steps: carrying out ultrasonic extraction on fresh tea leaf test samples by using an acetonitrile solution containing 1% of acetic acid by volume percent; purifying by using a suitable amount of PSA (Primary Secondary Amine), C18 and GCB (Graphitized Carbon Black) mixed fillers; blowing liquid supernatant by nitrogen and concentrating until the liquid supernatant is nearly dried; dissolving by acetone and enabling the volume to be constant; raising the temperature by using a DB-1701 quartz capillary column and separating; carrying out GC / FPD (Gas Chromatograph / Flame Photometric Detector) detection; and finally, quantifying by using a base material external standard method. A test confirms that the method has a wide linear range; the technical indexes including detection sensitivity, accuracy and precision meet the requirements of a residue analysis; the pre-treatment operation is simple, convenient and rapid and a reliable manner is provided for analytical researches for determining the organophosphorus pesticides in fresh tea leaves.

The invention discloses a method for determining diuron residues in sugarcane based on 3,4-dichloroaniline, comprising the following steps: S1. Using gas chromatography-mass spectrometry to determine the indicator component 3,4-diuron thermal decomposition Dichloroaniline; S2. Sample pretreatment: extract and purify the sugarcane sample to obtain the sugarcane solution to be tested; S3. prepare diuron standard solutions with at least 6 concentrations; prepare diuron standards for each concentration gradient The solution was determined by gas chromatography-electron capture detector, and a standard working curve was drawn; the content of diuron in the sugarcane test solution was determined. Using the method of the present invention, Diuron has a good linear relationship in the range of 0.01-5.0 mg / L, the correlation coefficients are all greater than 0.998, the detection limit is 0.007 mg / kg, and the recovery rate of Diuron in sugarcane juice is 89.2%. ‑111%, and the relative standard deviation is 2.45%‑6.57%. The accuracy and precision of this method can meet the requirements of pesticide residue analysis.

The invention provides a high performance liquid chromatography detection method for penicillin G in penicillin fungi residues, which relates to a detection method for penicillin G in penicillin fungi residues, and aims to solve the problems in the prior art that penicillin G in penicillin fungi residues cannot be rapidly and accurately detected. The method comprises the following steps of: 1, drawing a standard curve and fitting a standard curvilinear equation; 2, extracting to obtain an extraction solution of the penicillin G; 3, carrying out activation treatment; 4, eluting to obtain a solution to be detected; and 5, determining the content of the penicillin G. The high performance liquid chromatography detection method disclosed by the invention is mainly used for detecting the content of the penicillin G in the penicillin fungi residues.

The invention discloses a quantitative detection method for pyrethriods pesticides in fresh tea. The quantitative detection method is characterized by comprising the following steps: ultrasonically extracting a fresh tea sample by an acetonitrile solution containing 1% of acetic acid in percentage by volume, then purifying by using an appropriate amount of mixed filler of PSA (Prostate Specific Antigen), C18 and GCB, carrying out nitrogen blowing to concentrate liquid supernatant to be nearly dry, dissolving with normal hexane and making up to volume, increasing programmed temperature and separating by using an HP-5 quartz capillary column, carrying out GC / muECD, and finally quantifying by using a matrix external standard method. Through confirmation by test, the method is wide in linear range; the technical indexes such as detection sensitivity, accuracy and precision meet the requirements of analysis of residues; the pretreatment operation is simple, convenient and quick; through the method, a reliable manner is provided for analysis and research for detecting the residues of the pyrethriods pesticides in the fresh tea.

The invention discloses an analysis method applied to measuring residual quantity of sulfonylurea herbicide in plants. The method comprises the first step of preparing a stock solution, the second step of preparing extraction head through a QuEChERS method, the third step of processing samples and the fourth step of setting detection conditions of UPLC-MS / MS and conducting sample introduction. The method has the advantages that pretreatment is conducted through an extraction device, the sample purifying process is simple and quick, samples can be obtained through simple absorbing-pushing, results are accurate, and detection is quick; secondly, a sieve in the extraction head allows dispersion extraction, adsorbent, salt and other particulate matter can be removed out of the solution, the number of impurities is reduced, and convenience is brought to accurate quantitation; quantitation is accurate, sensitivity is high, operation is easy and quick, the consumption of the solvent is small, and the requirement for pesticide residue analysis can be met; the improved QuEChERS-method device is used for measuring the residue quantity of 10 kinds of sulfonylurea herbicide in plants.

The invention discloses a quantitative detection method for pyrethriods pesticide in soil. The method is characterized by comprising the following steps: carrying out ultrasonic extraction on a soil sample by using an acetonitrile solution of which the volume fraction is 1%, purifying by using proper mixed filler of PSA and C18; carrying out nitrogen blowing and concentrating on supernate until nearly dry; dissolving and metering volume by using normal hexane; heating up and separating by using HP-5 quartz capillary column program; carrying out GC / muECD detection; finally quantifying by using a matrix external standard method. A test proves that the method is wide in linear range, the technical indicators such as the detection sensitivity, the accuracy and the precision meet the requirements of residue analysis, the quantitative detection method is simple in pre-treatment operation, convenient and fast, and reliable means is provided for analysis and research of pyrethriods pesticide residue in the soil.

The invention relates to a method for determining residual medicaments in mutton, and in particular relates to a method for determining multiple sedative type medicaments in mutton at the same time. The residual sedative type veterinary medicaments refer to zolpidem, haloperidol, chlordiazepoxide, promethazine, nitrazepam, chlorpromazine hydrochloride, perphenazine, fluphenazine hydrochloride, clonazepam, xylazine hydrochloride, propionylpromazine, carazolol, acepromazine, droperidol and azaperone. The method has the advantage that the residual amounts of 15 types of sedative type medicaments in mutton are determined through high-resolution liquid chromatography-tandem mass spectrometry. The method is high in sensitivity and high in recovery rate, and can meet the detection requirements on veterinary medicaments.