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Method for measuring content of heavy metal in soil by hand-held X-ray fluorescence spectrometer

A fluorescence spectrometer, hand-held technology, applied in the field of analytical chemistry, can solve the problems of not being able to test anywhere, time-consuming, complicated methods, etc., and achieve good test results, accurate results, and uniform distribution of elements

Inactive Publication Date: 2017-09-19
SUZHOU LANSCI INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current method of soil detection by XRF is complicated, time-consuming, and the instrument is large, so it cannot be tested anywhere

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Take an appropriate amount of national standard soil GBW07406 as the soil standard and the soil sample to be tested (the soil around Suzhou), and then dry the soil standard and the soil sample to be tested at 108°C for 2 hours, and then dry the dried soil standard The product and the soil sample to be tested are lined with low-pressure polyethylene powder as the bottom, and then pressed at 32t for 35s to obtain the soil standard sample and the soil sample to be tested;

[0020] 2) Then determine the linear relationship according to the intensity and content, and make a calibration curve;

[0021] 3) Turn on the handheld X-ray fluorescence spectrometer and preheat it for 20 minutes, then test the soil standard sample and the soil sample to be tested, compare with the standard curve, and obtain the heavy metal content in the soil sample to be tested.

Embodiment 2

[0023] 1) Take an appropriate amount of national standard soil GBW07406 as the soil standard and the soil sample to be tested (the soil around Suzhou), and then dry the soil standard and the soil sample to be tested at 110°C for 2 hours, and then dry the dried soil standard The product and the soil sample to be tested are lined with low-pressure polyethylene powder as the bottom, and then pressed at 33t for 34s to obtain the soil standard sample and the soil sample to be tested;

[0024] 2) Then determine the linear relationship according to the intensity and content, and make a calibration curve;

[0025] 3) Turn on the handheld X-ray fluorescence spectrometer and preheat it for 22 minutes, then test the soil standard sample and the soil sample to be tested, compare with the standard curve, and obtain the heavy metal content in the soil sample to be tested.

Embodiment 3

[0027] 1) Take an appropriate amount of national standard soil GBW07406 as the soil standard and the soil sample to be tested (the soil around Suzhou), and then dry the soil standard and the soil sample to be tested at 112°C for 2 hours, and then dry the dried soil standard The product and the soil sample to be tested are lined with low-pressure polyethylene powder and pressed at 35t for 32s to obtain the soil standard sample and the soil sample to be tested;

[0028] 2) Then determine the linear relationship according to the intensity and content, and make a calibration curve;

[0029] 3) Turn on the handheld X-ray fluorescence spectrometer and preheat it for 20 minutes, then test the soil standard sample and the soil sample to be tested, compare with the standard curve, and obtain the heavy metal content in the soil sample to be tested.

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Abstract

The invention relates to a method for measuring the content of heavy metal in soil by a hand-held X-ray fluorescence spectrometer. The method comprises the following steps: 1) take an appropriate quantity of a soil standard sample and a to-be-tested soil sample, then drying the soil standard sample and to-be-tested soil sample, and pressing the dry soil standard sample and to-be-tested soil sample under 32-35 t for 32-35 s to obtain the soil standard sample and the to-be-tested soil sample; 2) drawing a calibration curve according to the linear relationship between strength and content; 3) opening the hand-held X-ray fluorescence spectrometer, preheating the hand-held X-ray fluorescence spectrometer for 20-25 min, then testing the soil standard sample and the to-be-tested soil sample, and comparing a result with the calibration curve to obtain the content of the heavy metal in the to-be-tested soil sample. The method has the advantages that the method is simple, operation is easy, analysis time is greatly shortened, the measurement result is accurate, and precision is high.

Description

Technical field [0001] The invention relates to a method for measuring heavy metals in soil, in particular to a method for measuring the content of heavy metals in soil by a handheld X-ray fluorescence spectrometer, and belongs to the technical field of analytical chemistry. Background technique [0002] Methods for determining heavy metals in soil include: chemical analysis, optical analysis, electrochemical analysis, chromatography, atomic absorption, chemiluminescence, etc. X-ray fluorescence spectroscopy (XRF) technology has been quite mature, and indoor XRF analysis has entered the practical stage, and has a wide range of applications in the fields of geology, biology, food, alloys and surface films. With the development of XRF analysis technology, it has also been applied to the detection of heavy metals in agricultural products and soil. [0003] However, the current method for detecting soil by XRF is complicated, time-consuming, and the instrument is large, so it cannot b...

Claims

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Application Information

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IPC IPC(8): G01N23/223
CPCG01N23/223
Inventor 杜亚明
Owner SUZHOU LANSCI INSTR
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