Method for simply detecting lead content in working environment and sampling device

A technology of working environment and sampling device, which is applied in sampling device, preparation of test samples, and analysis using chemical indicators, etc., can solve the problems of sampling pollution, failure, and poor sealing.

Active Publication Date: 2015-08-26
福建拓普检测技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Sampling devices include pump sampling devices and pumpless sampling devices. The pumpless sampling device is widely used due to its advantages of strong portability, flexible operation, and small size. Its structure roughly includes an inner tube and an outer tube sleeved outside the inner tube. , the inner tube is equipped with activated carbon, and the inner tube is equipped with through holes for the contact between the activated carbon and the air. The outer tube is used as the switch of the inner tube. In actual use, d...

Method used

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  • Method for simply detecting lead content in working environment and sampling device
  • Method for simply detecting lead content in working environment and sampling device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment one, comprises the steps:

[0063] (1) Pass 1 cubic meter of air through the sampling device at the job site, and use the sampling device to absorb lead particles in the air for sampling;

[0064] (2) Take out the absorber that absorbs lead-containing particles in the sampling device, and soak it in a bottle containing a mixed solution of sulfuric acid with a concentration of 50g / L and sodium chloride with a concentration of 120g / L, and wash all the lead-containing particles. Then take out the absorber and rinse the absorber with another mixed solution of sulfuric acid and sodium chloride, and let all the solution flowing down from the rinse flow into the bottle, so that the lead ions can be in the mixed solution as much as possible;

[0065] (3) In order to enhance the dissolution efficiency of lead ions, in a water bath at 80°C, use ultrasonic waves with a frequency of 18khz to pulverize and disperse the lead-containing particles in the bottle 10 times, 4 s...

Embodiment 2

[0069] Embodiment two, comprises the steps:

[0070] (1) Pass 1.5 cubic meters of air through the sampling device at the job site, and use the sampling device to absorb lead particles in the air for sampling;

[0071] (2) Take out the absorber that absorbs lead-containing particles in the sampling device, and soak it in a bottle containing a mixed solution of sulfuric acid with a concentration of 65g / L and sodium chloride with a concentration of 135g / L, and wash all the lead-containing particles. Then take out the absorber and rinse the absorber with another mixed solution of sulfuric acid and sodium chloride, and let all the solution flowing down from the rinse flow into the bottle, so that the lead ions can be in the mixed solution as much as possible;

[0072] (3) In order to enhance the dissolution efficiency of lead ions, in a water bath at 85°C, use ultrasonic waves with a frequency of 19.5khz to pulverize and disperse the lead-containing particles in the bottle 8 times,...

Embodiment 3

[0076] Embodiment three, comprises the steps:

[0077] (1) Pass 2 cubic meters of air through the sampling device at the job site, and use the sampling device to absorb lead particles in the air for sampling;

[0078] (2) Take out the absorber that absorbs lead-containing particles in the sampling device, and soak it in a bottle containing a mixed solution of sulfuric acid with a concentration of 80g / L and sodium chloride with a concentration of 150g / L, and wash all the lead-containing particles. Then take out the absorber and rinse the absorber with another mixed solution of sulfuric acid and sodium chloride, and let all the solution flowing down from the rinse flow into the bottle, so that the lead ions can be in the mixed solution as much as possible;

[0079] (3) In order to enhance the dissolution efficiency of lead ions, in a water bath at 90°C, use ultrasonic waves with a frequency of 21khz to pulverize and disperse the lead-containing particles in the bottle 6 times, 5...

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Abstract

The invention provides a method for simply detecting lead content in a working environment. The method comprises the following steps: absorbing lead-containing particles in a certain volume of air on a working site for sampling; taking out an absorber, soaking the absorber in an accommodating bottle for accommodating a mixed solution of sulfuric acid and sodium chloride, and washing the lead-containing particles completely; using ultrasonic waves to smash and disperse the lead-containing particles in the accommodating bottle; filtering impurities; dropping the quantitative lead ion solution in a methyl thymol blue chelate resin solid detection agent; measuring the length of a color-changing strip, contrasting with a standard curve to obtain lead ion content in the lead ion solution, and then calculating to obtain the lead content in the certain volume of air on the working site. Therefore, the whole process of sampling and detection can be realized smoothly and quickly, and accurate and efficient lead content detection on the working site can be achieved. The invention further provides a sampling device with high portability and a detachable combination function, the sealing of a sampling absorption working area can be effectively realized, and the working effectiveness and sampling index stability are guaranteed.

Description

technical field [0001] The invention relates to the field of a detection method and a device for lead content in the air, in particular to a method and a sampling device for simply detecting the lead content in the air of an operating environment. Background technique [0002] Among the many culprits that endanger human health and children's intelligence today, lead is one of the most harmful. According to an authoritative survey report, the average lead content in modern human body is 500 times higher than that of ancient people 1000 years ago! However, human beings lack active and effective protective measures. According to investigations, the average lead content in many children's bodies is generally higher than that of young people; traffic police are more deeply poisoned by lead than people in other industries. After lead enters the human body, except partly excreted through feces and sweat, the rest dissolves into the blood after a few hours, hindering the synthesis ...

Claims

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Application Information

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IPC IPC(8): G01N31/22G01N1/22G01N1/28
Inventor 陈金爱严和盛
Owner 福建拓普检测技术有限公司
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