43 results about "Laboratory quality control" patented technology

The invention discloses a capability verification sample for detection of textile color fastness to rubbing and a preparation method thereof. The capability verification sample is prepared by reactive dye or direct dye-based dying of pure cotton woven plain or twill bleached grey cloth. A test according to GB / T3920-2008 textile color fastness and color fastness to rubbing proves that color fastness to dry rubbing and color fastness to wet rubbing are in a range of 2-5 level, the existing daily detection range of color fastness to rubbing in the textile and clothing field is covered, and capability evaluation of different laboratory detection projects or laboratory quality control use is realized. The preparation method of the capability verification sample has simple processes, a high yield and high practicality. The capability verification sample can be stored and transported at a normal temperature and has uniformity and stability according with the CNAS-GL03 capability verification sample uniformity and stability evaluation guide requirements.

The invention relates to the field of analytical chemistry, in particular to a method for extracting vitamin K2 from a vitamin K2 embedding medium and a method for detecting the vitamin K2. According to the methods, the vitamin K2 embedding medium and acid are mixed, then subjected to ultraphonic processing, and then mixed with an organic solvent, the mixture is subjected to ultraphonic processing, and then the mixture is mixed with an organic solvent. The linearity, precision, repeatability, stability, blank, detection limit, quantitation limit and recovery experiments are carried out on the method for measuring the content of the vitamin K2, all the indexes meet the requirement of the GB / T27404-2008 laboratory quality control standard, it proves that the content measuring method is scientific and effective, and the quality control aim on the content of the vitamin K2 in the vitamin K2 compound preparation (embedding medium) can be achieved.

The invention discloses a full automatic glass slide smear dyeing machine, which comprises a slide and Tip head extraction module, a slide and Tip head frame, a sample frame, a label peeling module, afinished product slide cabin module, a slide dyeing module and a control module. The existing complicated morphologic sample pretreatment is converted into automatic equipment operation from manual operation; the labor cost of morphologic inspection is greatly reduced; the work efficiency of the morphologic inspection is improved; meanwhile, the specimen treatment quality is ensured. Meanwhile, the dropping liquid quantity is precisely controlled; the pellicle uniformity can be ensured. In addition, machine operation replaces manual operation of the gram stained slide; by aiming at the operation process, the quantitative control is performed; the dyeing effect and quality can be ensured; the dyeing effect deviation caused by different medical technological levels of different operation personnel is also avoided; the laboratory quality control management can be performed.

The invention relates to the field of analytical chemistry, in particular to a xylo-oligosaccharide content detection method. The detection method comprises steps as follows: a xylo-oligosaccharide test sample is taken and hydrolyzed, a hydrolyzed xylo-oligosaccharide test sample is obtained, HPLC (high performance liquid chromatography) is adopted for detection, the chromatographic condition of the HPLC is as follows: a saccharide column or an amino column is adopted, purified water or an acetonitrile aqueous solution is taken as a mobile phase for isocratic elution, and the xylo-oligosaccharide content is obtained according to an HPLC detection result. With the adoption of the detection method, interference of other functional saccharide cellulose can be eliminated, and the xylo-oligosaccharide content can be accurately detected; the xylo-oligosaccharide content detection method meets the requirement of the GB / T 27404-2008 Criterion on Quality Control of Laboratories-Chemical Testing of Food through linearity and precision tests and recovery rate tests, it proves that the detection method is scientific and effective, and the purpose of quality control on the xylo-oligosaccharide content detection can be achieved.

The invention discloses manufacture and application methods of a hepatitis B surface antigen serum laboratory quality control material. The manufacture method comprises five steps as follows: acquisition and screening of raw materials, diluted serum manufacturing, preservation and monitoring of a standby quality control material, quality control, continuous improvement, etc. The application method comprises three steps as follows: storage, re-dissolution and application. The manufacture and application methods of the hepatitis B surface antigen serum laboratory quality control material are complete and clear. Due to the usage of a quality control chart of multiple impact factors, accuracy is high and control range is wide. By adoption of 31S quality control limit which is very sensitive to the system problem of unreasonable fundamental technological processes caused by insufficient technical capacity in the production process, the method is helpful for guaranteeing accuracy of the technological direction and determining good technological foundation and optimizing production technology.

The invention discloses a determination method of the content of inorganic phosphorus in sodium phytate. The determination method comprises the following steps: firstly, adding a ferric trichloride solution into a sodium phytate sample solution to form sediment [C6H6(OH)H3(PO4)6]3Fe; removing base material influences of the sodium phytate by using a chelating effect of phytic acid and metal ions; centrifuging at a high speed to remove the sediment and adding a vanadate molybdate solution to generate a yellow phosphorus-vanadium molybdate coordination compound; determining a light absorption value at 420nm by using a spectrophotometer; calculating the content of the inorganic phosphorus in the sample according to a standard curve. According to the determination method provided by the invention, a base material effect is removed by using ferric trichloride and then a vanadium-molybdenum-yellow method is used for determining the content of the inorganic phosphorus; the method is reasonable and is simple and convenient to operate; the problems that the inorganic phosphorus in the sodium phytate is detected and has no recycling, and the base material interference is eliminated are solved; when the adding concentration is 0.02 percent to 0.08 percent, the recycling rate ranges from 99.0 percent to 102.48 percent, and the relative standard deviation is smaller than 1.16 percent; the technological indexes meet the requirements of GB / T 27404-2008 Food Physicochemical Detection of Laboratory Quality Control Standards.

The invention relates to the technical field of quality control and especially relates to a detection method for organic artificial color content. The detection method comprises the following steps: mixing a sample with alkali liquor and regulating pH value to 7, thereby acquiring a tested liquor, and then adopting high performance liquid chromatography for detecting the tested liquor and acquiring the organic artificial color content according to a content detection result of a standard substance. The chromatographic conditions of the high performance liquid chromatography are as follows: flowing phases: ammonium acetate is served as a flowing phase A and acetonitrile is served as a flowing phase B; elution process: gradient elution; chromatographic column: C18 chromatographic column; enticed red and / or sodium indigotin-disulfonate is served as the organic artificial color. The linearization, precision, repeatability, stability, blank, detection limit, quantitation limit and recovery rate of detection method provided by the invention all meet the requirement of GB / T27404-2008 'Laboratory Quality Control Specification'; the content detection method is proved as scientific and effective; the purpose of quality control for the content of enticed red and / or sodium indigotin-disulfonate in a tablet can be achieved.

The invention discloses a method for preparing a tetrodotoxin positive quality control sample. The method comprises the steps of selecting muscular tissues from fresh fugu rubripes, homogenizing, and measuring the content of tetrodotoxin in the muscular tissues to verify whether the muscular tissues contain the tetrodotoxin; if the muscular tissue is a positive sample, diluting the positive sample containing toxin with a negative sample and a dispersant, mixing uniformly, continuously measuring the content of the toxin in the sample, packaging the sample after the sample meets requirements, preserving at an appropriate temperature, and performing uniformity verification and stability analysis on the sample; if the muscular tissue is a negative sample, adding a tetrodotoxin standard solution into the negative samples, adding a dispersant, mixing uniformly, measuring the content of the tetrodotoxin in the sample, packaging the sample after the sample meets requirements, preserving at an appropriate temperature, and performing uniformity verification and stability analysis on the sample. The quality control sample is simple to operate, and has enough stability and uniformity and long preservation time, so that the quality control sample can be used for laboratory quality control.

The invention discloses a standard sample of imperfect corn kernels and a preparation method thereof. The standard sample of imperfect corn kernels is made from insect-eaten kernels, disease-spotted kernels, broken kernels, sprouted kernels, moldy kernels and heat-damaged kernels, which are embedded in organic resin. The invention adopts organic resin embedding technology to make standard samples of imperfect corn grains, which have excellent properties such as flame retardancy, aging resistance, non-toxicity, oxidation resistance, heat resistance, insulation, etc., and the standard samples of imperfect corn grains are developed in this inspection field. Quality control activities provide a reliable and scientific material basis, which is conducive to laboratory quality control, is conducive to improving the quality management level of the laboratory, and reduces the risk of the accuracy of laboratory test results.

The invention relates to the field of quality control technology, especially to a cholesterol content detection method. The detection method comprises the following steps: a sample to be measured is dissolved in an organic solvent to obtain a test solution, and content of cholesterol in the test solution is detected by a gas chromatography-mass spectrum technology, wherein the organic solvent is one selected from isooctane, ether and hexane or a mixture of more than two selected from isooctane, ether and hexane. By the detection method, detection time can be greatly shortened, and detection accuracy can be raised. through the cholesterol content detection method, linearity, precision, repeatability, stability, blank, detection limit, quantification limit and recovery rate tests all meet requirements of GB / T27404-2008 ''laboratory quality control specification''. It proves that the method is scientific and effective and can be adopted for achieving the purpose of quality control of cholesterol content in animal and plant samples.