Method for improving linearity of extraction experiment standard curve

A standard curve and extraction technology, which is applied in the field of standard curve drawing, can solve the problems of affecting the determination coefficient and insufficient filtering effect, and achieve the effects of reducing the detection limit, improving precision and accuracy, and improving precision

Pending Publication Date: 2021-02-12
陕西驭腾测试技术有限公司
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Problems solved by technology

This method is common for extraction experiments, but for some extraction experiments that require high precision and high water content, this method is insufficient
After manual or machine vibration, the residual liquid on the wall of the extraction container greatly affects the coefficient of determination R2 of the curve, and the filtering effect of the extraction liquid on the absorbent cotton is also insufficient.

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  • Method for improving linearity of extraction experiment standard curve
  • Method for improving linearity of extraction experiment standard curve
  • Method for improving linearity of extraction experiment standard curve

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Embodiment Construction

[0021] The present invention is further described below in conjunction with accompanying drawing:

[0022] see figure 2 and Figure 4 , a method for improving the linearity of the standard curve for extraction experiments, comprising the following steps:

[0023] Step 1, shake the extraction solution to make it fully fused and extracted;

[0024] Step 2, after taking out the extract, add a dewatering agent that does not interfere with its own properties;

[0025] Step 3, then within the wavelength range corresponding to the characteristic absorption peak of the experiment, the concentration of the gradient extract is used as the independent variable, and the corresponding absorbance is used as the dependent variable to draw a curve to obtain the highest coefficient of determination R 2 .

[0026] In step 2, the dewatering agent is calcium chloride, anhydrous sodium sulfate or anhydrous magnesium sulfate.

[0027] In step 1, after vibration extraction, if there is extract...

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Abstract

The invention discloses a method for improving the linearity of an extraction experiment standard curve. According to the method, an extraction container is ultrasonically vibrated; a water removal agent is added into an obtained extraction agent; rotary centrifugation is carried out to obtain a supernatant to be detected; and therefore, a solute to be detected is fully and uniformly extracted into the extraction agent, and the interference of impurities is avoided. A curve is drawn by taking the concentration of the gradient extracting solution as an independent variable and taking the absorbance corresponding to the gradient extracting solution as a dependent variable in the wavelength range of a corresponding experimental characteristic absorption peak to obtain a highest determinationcoefficient R2. The experiment precision and accuracy can be effectively improved; and the experiment detection limit is lowered.

Description

technical field [0001] The invention belongs to the field of standard curve drawing, in particular to a method for improving the linearity of the standard curve for extraction experiments. Background technique [0002] Extraction is one of the means used in chemical laboratories to purify and purify compounds. By extraction, the desired substance can be extracted from a solid or liquid mixture. Using the difference in solubility or distribution coefficient of a substance in two immiscible (or slightly soluble) solvents, the substance is transferred from one solvent to another. After repeated extractions, most of the compounds are extracted. [0003] In the field of environmental monitoring and analysis, extraction experiments have become common experimental methods due to their advantages of high precision and low detection limit. The more classic experiments include the determination of volatile phenol content and anion content. However, in the actual work of environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/34G01N21/31
CPCG01N1/34G01N21/31
Inventor 陈力群
Owner 陕西驭腾测试技术有限公司
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