5 results about "Standard addition" patented technology

The application provides a method for determining the content of Zr metal ions in a high-purity volatile organic matrix environment by ICP-MS, comprising the following steps: (1) based on the volatile nature of the organic matrix, replacing the sampling system and debugging the instrument parameters; (2) acidifying the volatile organic matrix to be tested; (3) testing on the machine; (4) according to the generated standard curve, reading out the content of the metal ion Zr in the high-purity reagent IPA. The method directly and effectively improves the problem that the direct sampling ICP-MS cannot pull out the Zr element standard curve and thus cannot read out the content of Zr in IPA; meanwhile, the pretreatment method of the method is an acidification method, which is simple to operate and low in time cost; and the standard addition method can eliminate the matrix interference, realize the detection of the metal ion Zr under the high-purity matrix, and meet the production demand.

The application discloses a raw material medicine trace heavy metal ion detection method and system based on a micro-fluidic chip, relates to the technical field of micro-fluidic detection and electrochemical analysis, and comprises the following steps: weighing, constant volume, clarification of the raw material medicine sample, solidifying target ions, standard calibration and peak interval / scanning parameters into a detection parameter table; according to the detection parameter table, the flow and valve control are controlled to complete liquid preparation, muSPE enrichment, washing, elution and constant volume loading on the chip; blank, no standard addition, one-time standard addition and numbered archiving are sequentially measured; baseline is made according to the solidified parameters, integration and blank deduction are carried out, the solution concentration is calculated combined with standard addition measurement, and the content is output. The method disclosed by the application can constrain micro-fluidic liquid preparation, enrichment, elution and constant volume loading, so that blank, no standard addition and standard addition three rounds are measured under the same source condition; the curve and standard addition measurement are numbered and archived, integral, blank deduction and concentration are solved simultaneously, and the quantitative consistency, traceability and calculation reliability are improved.

This invention discloses a nanozyme for the detection of phenolic compounds and a quantitative detection method for phenolic compounds. The nanozyme comprises an organometallic framework material and copper loaded on the surface of the organometallic framework material, possessing a core-shell structure. The active metal catalytic center is loaded on the material surface, which helps to improve the utilization efficiency and catalytic activity of the active center, thereby enhancing the detection capability of large molecular weight phenolic compounds. Based on the standard addition method, the nanozyme of this invention can be used for the quantitative analysis of BPA in environmental water and thermal paper, exhibiting high accuracy and sensitivity, and strong anti-interference ability. The quantitative detection method of this invention can be used in conjunction with an image acquisition device for quantitative calculation of phenolic compounds, further simplifying the detection of phenolic compounds.

The present application belongs to the technical field of biochemical detection, and discloses a rapid detection method for sodium diacetate in duck blood, which solves the technical problem that the existing detection method cannot accurately detect low content of sodium diacetate in duck blood. The steps are as follows: (1) adding phosphoric acid to sodium diacetate standard solutions with different concentrations to obtain a to-be-detected standard solution; detecting the peak area of the to-be-detected standard solution by gas chromatography, and preparing a standard curve of the concentration of the sodium diacetate standard solution and the peak area; (2) pretreating duck blood samples to obtain a to-be-detected solution; (3) detecting the to-be-detected solution by gas chromatography, and bringing the obtained peak area into the standard curve of step (1) to obtain the concentration of sodium diacetate in the to-be-detected solution. The rapid detection method has a detection limit of 0.007 g / kg, a sample standard addition recovery rate of 92.5-102.4%, good repeatability, a coefficient of variation of less than 10%, and high detection accuracy.

The present application relates to river and lake water environment in-situ monitoring and analysis detection technical field, especially to a kind of river and lake multi-source complementary water quality-ecological index in-situ detection and self-calibration method and device, by switching between water sample, blank and standard liquid and standard addition to the same water sample, generate at least two standard addition gradient points of standard addition increment concentration and online update zero point and sensitivity;Convert optical / electrochemical and other multi-mechanism channels into index values, based on uncertainty, drift / mutation characterization and physical constraints, consistency fusion is carried out based on adjacent station consistency, and the data packet containing fusion value, reliability and status code is output.The present application can significantly reduce the influence of long-term drift, biological fouling and matrix change on measurement results, improve the stability and consistency of in-situ continuous monitoring data, so it is suitable for long-term unattended deployment, improve the availability and traceability of continuous monitoring data.