ASTM-D6552 2011

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D6552-06(2011) Standard Practice for Controlling and Characterizing Errors in Weighing Collected Aerosols

Published By	Publication Date	Number of Pages
ASTM	2011	9

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Categories: 13.040.99 - Other standards related to air quality, ASTM

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Description

1.1 Assessment of airborne aerosol hazards in the occupational setting entails sampling onto a collection medium followed by analysis of the collected material. The result is generally an estimated concentration of a possibly hazardous material in the air. The uncertainty in such estimates depends on several factors, one of which relates to the specific type of analysis employed. The most commonly applied method for analysis of aerosols is the weighing of the sampled material. Gravimetric analysis, though apparently simple, is subject to errors from instability in the mass of the sampling medium and other elements that must be weighed. An example is provided by aerosol samplers designed to collect particles so as to agree with the inhalable aerosol sampling convention (see ISO TR 7708, Guide D6062 , and EN 481). For some sampler types, filter and cassette are weighed together to make estimates. Therefore, if the cassette, for example, absorbs or loses water between the weighings required for a concentration estimation, then errors may arise. This practice covers such potential errors and provides solutions for their minimization.

1.2 The values given in SI units are to be regarded as standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Significance and Use Weight Instability, Causes, and Minimization
3	Correcting for Weight Instability TABLE 1
4	Transport of Samples to Laboratory Weighing Equipment and Procedure
5	Reporting of Measured Weight Keywords A1. ESTIMATION OF MEASUREMENT UNCERTAINTY A1.1 The Variance w2 in Weight Estimates
6	A1.2 Determination of the Uncorrectable Weight-Change Uncertainty u A1.3 The Uncertainty Component uw A1.4 Limit of Detection (LOD) A1.5 Limit of Quantitation (LOQ) A2. INTERPRETATION OF LOD AND LOQ A2.1 False-positive Rate upon Using LOD for Detection Assertion
7	A2.2 Interpretation of LOQ A3. METHOD EVALUATION EXAMPLE A3.1 A3.2 A3.3 A3.4 A3.5 A4. TEST OF TRANSPORTATION INTEGRITY A4.1 General TABLE A3.1
8	A4.2 Procedure A4.3 Requirement REFERENCES

Additional information

Standard Title	D6552-06(2011) Standard Practice for Controlling and Characterizing Errors in Weighing Collected Aerosols
Published Code	ASTM
Publication Date	2011
Pages Count	9
ICS Codes	13.040.99 - Other standards related to air quality

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ASTM-D6552 2011

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