Method for measuring calcium contents of inhalable particles in building construction dust and method for detecting accuracy

A technology for building construction and measurement methods, which is used in measurement devices, preparation of samples for testing, and measurement of color/spectral properties, etc. The effect of improving measurement accuracy and accuracy, short sampling time and numerical stability

Inactive Publication Date: 2016-06-15
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • 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

Method used

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  • Method for measuring calcium contents of inhalable particles in building construction dust and method for detecting accuracy
  • Method for measuring calcium contents of inhalable particles in building construction dust and method for detecting accuracy
  • Method for measuring calcium contents of inhalable particles in building construction dust and method for detecting accuracy

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Effect test

Embodiment 1

[0040] Such as figure 1 As shown, a method for determining the calcium content of inhalable particulate matter in construction dust requires the following steps in sequence:

[0041] Step 1: Take 100g of construction dust and place it in an ultrasonic vibrating sieve, screen through 250-mesh, 1200-mesh, and 5000-mesh sieves respectively, and collect an appropriate amount of samples that finally pass through the 5000-mesh sieve. The relationship between the sieve apertures 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 0.0320g of samples with an electronic balance, and weigh ...

Embodiment 2

[0058] The working principle of embodiment two is basically the same as that of embodiment one, the only difference is: the quality of construction dust in step 1 is 120g, the quality of the sample taken with electronic balance in step 2 is 0.0313g, and the final measured The calcium content of inhalable particulate matter in construction dust is 216.28mg / 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 construction dust in step 1 is 150g, the quality of the sample taken by electronic balance in step 2 is 0.0358g, and the final measured The calcium content of inhalable particulate matter in construction dust is 221.51mg / kg.

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Abstract

The invention discloses a method for measuring the calcium contents of inhalable particles in building construction dust.The method includes steps of extracting samples; pre-treating the samples; carrying out evaporation volume setting; preparing standard blank solution and standard working solution; measuring the calcium contents by means of graphite furnace atomic absorption spectrometry.The invention further discloses a method for detecting the accuracy of the method for measuring the calcium contents of the inhalable particles in the building construction dust.The method for detecting the accuracy includes steps of preparing five portions of to-be-tested sample solution with different concentrations from national standard substances with known calcium contents; respectively detecting the calcium contents of the to-be-tested sample solution by the aid of the method for measuring the calcium contents of the inhalable particles in the building construction dust, and verifying the accuracy of the method for measuring the calcium contents of the inhalable particles in the building construction dust.The methods have the advantages of short sampling time, high digestion speed, little measurement disturbance, accurate and reliable results and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental detection, and in particular relates to a method for measuring calcium content of inhalable particles in construction 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 impact on hu...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/40
CPCG01N21/31G01N1/4044
Inventor 程学珍李超杜彦镔冯翠萍尹唱唱焦帅朱晓林
Owner SHANDONG UNIV OF SCI & TECH
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