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Determination method for chromium content of inhalable particles in soil dust and detection method

A method for measuring chromium content, which is applied in measuring devices, color/spectral characteristic measurement, instruments, etc., can solve the problems of unsuitable batch sample extraction operation, small sampling quantity, and long sampling time, so as to improve measurement accuracy and The effect of accuracy, numerical stability, and short sampling times

Inactive Publication Date: 2016-06-08
SHANDONG UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Ministry of Environmental Protection of the People's Republic of China issued the document No. [2013] No. 92 "Technical Guidelines for Source Analysis of Atmospheric Particulate Matter (Trial)" which proposed the method of extracting inhalable particulate matter (PM2.5) from stationary pollution sources by using a particulate matter resuspension device. The method takes a long time to sample, the number of single samples is small, and the operation is cumbersome, so it is not suitable for batch sample extraction operations

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  • Determination method for chromium content of inhalable particles in soil dust and detection method
  • Determination method for chromium content of inhalable particles in soil dust and detection method
  • Determination method for chromium content of inhalable particles in soil dust and detection method

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Embodiment 1

[0040] like figure 1 As shown, a method for the determination of chromium content of respirable particulate matter in soil wind and sand dust needs to carry out the following steps successively:

[0041] Step 1, take 100g of soil wind and sand dust and place it in an ultrasonic vibrating sieve, screen through 250 mesh, 1200 mesh, and 5000 mesh screens respectively, and collect an appropriate amount of samples that finally pass through the 5000 mesh screen. The relationship with the sieve aperture is shown in Table 1 below:

[0042] Table 1 The relationship between the mesh number of the screen and the aperture of the screen

[0043] Sieve mesh (pieces / square inch) 250 1200 5000 Screen aperture (um) 58 11 2.6

[0044] Step 2, sample pretreatment, put the collected samples above into a blast drying oven for drying treatment, take out the samples after drying, and cool the taken out samples to room temperature; then weigh 0.0328g of samples with an electr...

Embodiment 2

[0058] The working principle of embodiment two is basically the same as that of embodiment one, and the only difference is: the quality of soil wind and sand dust in step 1 is 120g, and the quality of the sample taken with electronic balance in step 2 is 0.0385g, finally measured The chromium content of respirable particulate matter in the soil wind and dust is 32.49mg / kg.

Embodiment 3

[0060] The working principle of embodiment three is basically the same as that of embodiment one, and the only difference is: the quality of the soil wind and dust in step 1 is 150g, and the quality of the sample taken with an electronic balance in step 2 is 0.0317g, and finally measured The chromium content of respirable particulate matter in the soil wind and dust is 33.86mg / kg.

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Abstract

The invention discloses a determination method for the chromium content of inhalable particles in soil dust. The determination method includes the following steps of sample extraction, sample pretreatment, acid removal and volume metering, preparation of a standard blank solution and a standard working solution, and graphite furnace atomic absorption spectrometry determination. The invention further discloses a detection method for the accuracy of the determination method for the chromium content of inhalable particles in soil dust. The detection method includes the following steps that a national standard substance with the known chromium content is prepared into five parts of sample solutions to be detected, wherein the concentrations of the sample solutions to be detected are different; the chromium content in each sample solution to be detected is detected with the determination method for the chromium content of inhalable particles in soil dust so that the precision of the determination method for the chromium content of inhalable particles in soil dust can be verified. The determination method and the detection method have the advantage that sampling time is short, digestion is fast, little interference exists in determination, and the result is accurate and reliable.

Description

technical field [0001] The invention belongs to the technical field of environmental detection, and in particular relates to a method for measuring the chromium content of respirable particles in soil wind and dust and a detection method. Background technique [0002] In the past fifty years, with the rapid development of industrialization and urbanization in our country, the problem of air pollution has become increasingly serious. In 2013, "smog" became the keyword of the year. On January 4, 2014, the National Disaster Reduction Office and the Ministry of Civil Affairs included health-threatening haze weather in the 2013 natural disaster situation for the first time. The inhalable particulate matter (PM2.5) in the smog can be inhaled by the human body because its aerodynamic particle size is less than 2.5 microns, and deposited in the respiratory tract, alveoli and other parts, causing respiratory system lesions and even cancer and other diseases, which have a great impac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/04G01N21/31
CPCG01N1/04G01N21/3103
Inventor 程学珍李超冯翠萍杜彦镔尹唱唱朱晓林焦帅
Owner SHANDONG UNIV OF SCI & TECH
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