Manufacturing method for standard mass membrane used for beta-ray particulate matter calibration

A standard quality and production method technology, applied in particle suspension analysis, measuring device, suspension and porous material analysis, etc., can solve the problems affecting the measurement work efficiency, small purchase quantity, long time period, etc., and achieve convenient acquisition , low cost, fixed and stable effect

Inactive Publication Date: 2013-03-20
QINGDAO JIAMING MEASUREMENT & CONTROL TECH
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  • Abstract
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Problems solved by technology

[0005] Aiming at the shortcomings of the current standard diaphragms that can only be supplied from abroad, the price is high, the quantity that can be purchased is small, the purchase is inconvenient and the time period is long, which seriously affects the work efficiency of the measurement work, a β-ray method for particle calibration is proposed. Method for making a standard quality diaphragm

Method used

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  • Manufacturing method for standard mass membrane used for beta-ray particulate matter calibration
  • Manufacturing method for standard mass membrane used for beta-ray particulate matter calibration
  • Manufacturing method for standard mass membrane used for beta-ray particulate matter calibration

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Embodiment Construction

[0028] The invention relates to a method for making a standard quality diaphragm for calibrating particle matter in the beta ray method.

[0029] Select a 65μm optical polyester film, put the optical polyester film into a pure potassium hydroxide solution with a temperature of 60°C and a concentration of 6mol / L for etching, and etch the optical polyester film to 39±0.1μm by controlling the etching time , 44.7±0.1μm, 54.4±0.1μm thickness, the temperature is 60 ℃ and the concentration is 6mol / L pure potassium hydroxide solution has better etching effect and high etching efficiency.

[0030] Cut the optical polyester film into a suitable size diaphragm 4 using a circular mold, place the diaphragm 4 with a thickness of 44.7±0.1 μm and 54.4±0.1 μm between the radiation source and the detector for continuous testing for 4 minutes, and record the test For the obtained equivalent mass value, repeat the test 8 times to take the median value of the equivalent mass value, and use the med...

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Abstract

The invention provides a manufacturing method for a standard mass membrane used for beta-ray particulate matter calibration. According to the invention, chemical etching is utilized to control equivalent mass of the membrane, process requirements are low, manufacturing of the standard mass membrane can be carried out in a chemical laboratory of a normal grade, medicines and materials needed in manufacturing have low cost and are easily available, the standard mass membrane can be made at any time as needed instead of being imported from abroad, work efficiency of measuring can be guaranteed, fixation of the membrane is firm, the problem of inaccurate measurement results resulting from deformation caused by unfirm bonding of the membrane is avoided, the thickness of the membrane is not a fixed value, the equivalent mass can be in a required range, and the standard mass membrane has a wide application scope.

Description

technical field [0001] The invention relates to a method for manufacturing a diaphragm for measuring instruments, in particular to a method for manufacturing a standard quality diaphragm used for calibrating particles in the beta-ray method for measuring instruments. Background technique [0002] Total suspended particulate matter is a common and important pollution indicator in air quality assessment, which refers to particulate matter suspended in the air with an aerodynamic equivalent diameter of ≤100 μm. It mainly comes from smoke and dust generated during fuel combustion, dust generated during production and processing, construction and traffic dust, wind and sand dust, and corresponding salt particles generated in the air by gaseous pollutants through complex physical and chemical reactions. Particulate matter with a particle size below 10 microns is usually called PM10, also known as inhalable particulate matter or floating dust. The smaller the diameter of the parti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
Inventor 高心岗郭松明郝纯青赵军峰程丽华
Owner QINGDAO JIAMING MEASUREMENT & CONTROL TECH
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