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Method for detecting concentration of lemon chrome yellow in heavy metal concentrated acid liquid

A technology of lemon chrome yellow and detection method, applied in Raman scattering, material excitation analysis and other directions, can solve the problems of inability to exclude other sources of lead and chromium, inability to achieve rapid detection, and insufficient application range, and to achieve convenient focusing, The effect of speeding up processing and avoiding distractions

Active Publication Date: 2014-11-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Atomic fluorescence spectrometry has the characteristics of high sensitivity, strong selectivity, small sample amount and simple method; but its disadvantage is that the scope of application is not wide enough
[0008] The above methods all identify the presence of heavy metals lead and chromium in the solution, and then infer the residual lemon chrome yellow content in the liquid, but in the process of liquid treatment, other sources of lead and chromium cannot be ruled out
Therefore, the detection of heavy metals lead and chromium alone cannot determine that the lead and chromium in the liquid must come from lemon chrome yellow
Moreover, a large amount of reagents are required for pretreatment when using the above method for detection, the process is cumbersome, and rapid detection cannot be achieved
In addition, there are few reports on the monitoring of residual lemon chrome yellow in each process during the treatment of lemon chrome yellow wastewater.

Method used

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  • Method for detecting concentration of lemon chrome yellow in heavy metal concentrated acid liquid
  • Method for detecting concentration of lemon chrome yellow in heavy metal concentrated acid liquid
  • Method for detecting concentration of lemon chrome yellow in heavy metal concentrated acid liquid

Examples

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Embodiment 1

[0050] A method for detecting the concentration of lemon chrome yellow in heavy metal concentrated acid liquid, comprising:

[0051] (1) Take heavy metal concentrated acid liquids with different concentrations of lemon chrome yellow as test samples, and obtain each test sample at 2717.2cm -1 ~112.3cm -1 Raman spectra with a silicon wafer as a substrate in the wavenumber range.

[0052] In the present embodiment, a 96-well flat-bottomed culture dish (aperture: 6.4mm, bottom area: 0.32cm 2 , with a volume of 0.36ml) as a container, and one hole as a container. Place a circular silicon wafer with a diameter of 5mm and a thickness of 0.5mm at the bottom of each well, pipette 0.4ml of liquid into the well of the petri dish, and remove the excess liquid along the edge of the petri dish with a scraper , and then place the Petri dish on a glass slide for use.

[0053] The container containing the test samples is placed on the stage of the micro-Raman spectrometer to test the Raman...

Embodiment 2

[0075] Same as embodiment 1, the difference is that after building the calibration model in step (3), it also includes updating the calibration wavenumber and the calibration model, and the update method is as follows:

[0076] Perform analysis of variance on the first linear regression model to screen the calibration wavenumber, and use the screened calibration wavenumber as the final calibration wavenumber, and according to the concentration of lemon chrome yellow in all test samples, and each calibration wavenumber after screening in the Raman spectrum The peak intensity at the standard wave number and 520cm -1 The ratio of the peak intensity at the concentration-intensity ratio constructs the second linear regression model of the concentration-intensity ratio as the updated calibration model.

[0077] The variance analysis was carried out on the calibration model, and the results are shown in Table 2

[0078] Table 2

[0079]

[0080] Table 2 shows the wavenumber vari...

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Abstract

The invention discloses a method for detecting the concentration of lemon chrome yellow in a heavy metal concentrated acid liquid. The method comprises the steps: taking heavy metal concentrated acid liquids with different concentrations of lemon chrome yellow as test samples, and acquiring Raman spectra of all the test samples in a set wave number range and with a silicon slice as a substrate; according to the Raman spectra of all the test samples, respectively using a continuous projection algorithm and a multivariate linear regression analysis method to determine calibration wave numbers; according to the lemon chrome yellow concentrations of all the test samples, and ratio values of the peak intensities of all the calibration wave numbers to the 520 cm<-1> peak intensity, building a concentration-strength ratio first linear regression model as a calibration model, and measuring by using the calibration model to obtain the concentration of lemon chrome yellow in a to-be-measured sample. The method utilizes the Raman test for analysis, is simple to operate, does not need a tedious and time-consuming sample preparation process, at the same time, avoids interference from other sources so as to ensure the accuracy of the tested lemon chrome yellow, and greatly improves the test accuracy with silicon as a contrast.

Description

technical field [0001] The invention relates to the technical field of lemon chrome yellow concentration detection, in particular to a detection method for lemon chrome yellow concentration in heavy metal concentrated acid liquid. Background technique [0002] Lemon chrome yellow is one of lead chrome yellow. It is a pigment used for oily synthetic resin coatings, printing inks, watercolors and oil paints. It is an inorganic coloring pigment for colored paper, rubber and plastic products. Because of its perfect pigment application Performance, relatively low price and complete color range, so it has been widely used. Its main chemical composition is lead chromate, which is very harmful to the human body and can cause anemia, kidney damage, lead poisoning, dermatitis, eczema, chromic nose disease and skin ulcers, etc. The International Cancer Research Center (IARC) has Include "chromium and certain chromium compounds" as chemicals that are carcinogenic to humans. And about ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 李晓丽孙婵骏何勇
Owner ZHEJIANG UNIV
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