3results about How to "Accurate detection means" patented technology

The invention discloses a fluorescence photometric determination method for trace aluminum in internal cooling water of a high-voltage direct-current converter valve. The method comprises the following steps: adjusting the pH value of an internal cooling water sample of the high-voltage direct-current converter valve to 2.0-7.0; the method comprises the following steps: putting a preset amount of a pH-value-adjusted internal cooling water sample into a colorimetric tube, adding a pH-value buffer solution into the colorimetric tube, and adjusting the pH value of a reaction system to 4.0-5.0; the method comprises the following steps: adding an aluminum ion fluorescent probe compound solution into a colorimetric tube, fully mixing at room temperature, and standing for reaction, so that aluminum ions and an aluminum ion fluorescent probe compound are fully complexed to form a stable complex, thereby obtaining a reacted to-be-detected solution; and measuring the fluorescence intensity of the reacted liquid to be measured, and determining the aluminum ion concentration of the internal cooling water of the high-voltage direct-current converter valve according to the fluorescence intensity and a preset standard working curve. According to the invention, high-sensitivity, low-detection-limit and high-accuracy determination of trace aluminum in cold water in the high-voltage direct-current converter valve is realized.

The application belongs to the technical field of gene detection, and particularly relates to specific primers, a Taqman probe and application of a bacillus velezensis HMB26553 strain. The specific primers and the probe sequence of the bacillus velezensis HMB26553 strain are respectively SEQ ID NO. 1, SEQ ID NO. 2 and SEQ ID NO. 3. The primers can amplify a single unique target fragment from the bacillus velezensis HMB26553 strain, and realize specific detection of the bacillus velezensis HMB26553 strain. The primers have the characteristics of high specificity, high detection efficiency, low false positive rate, long preservation time and the like. By using the primers and through real-time quantitative PCR technology, the population quantity of the bacillus velezensis HMB26553 strain in the rhizosphere of cotton can be quickly quantified, and the primers have the advantages of high throughput, rapidness and accuracy.

The application provides a detection method for chlorobenzene formaldehyde compounds in a hydrochloride hydrogen sulfate clopidogrel starting material, and relates to the technical field of drug analysis and detection. The detection method comprises the following steps: detecting a test solution by using a high performance liquid chromatography method, and qualitatively and / or quantitatively analyzing chlorobenzene formaldehyde compounds in the test solution; wherein, a chromatographic column for detection is a pentafluorophenyl bonded silica gel chromatographic column; the detection is carried out by using a mobile phase A and a mobile phase B for isocratic elution, the mobile phase A is a phosphoric acid aqueous solution, and the mobile phase B for detection is an organic solvent. The detection method is detected by using the high performance liquid chromatography method, the chromatographic conditions are optimized, the qualitative and quantitative analysis of o-chlorobenzene formaldehyde, m-chlorobenzene formaldehyde and p-chlorobenzene formaldehyde in o-chlorobenzene glycine methyl ester tartrate is realized, the detection specificity is high, the sensitivity is high, the repeatability is good, and the detection result is accurate and reliable.