Agrawal, A. K. (2008) Estimation of the Uncertainty in Chemical Measurements. MAPAN - Journal of Metrology Society of India, 23 (4). pp. 217-224. ISSN 0974-9853

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Abstract

Large numbers of measurements are being carried out in the industries and all the sectors of science and technology including environment, health, engineering and agriculture to ensure the quality of product and test results. Acceptance and rejection of products depends on the measurement values which provide the information that quality of the products is within the acceptable limits of the specification. Moreover, trading or controlling authorities related to health and environment sectors are also depends on the quality of the measurement value. This factor become very important when, the measurement value lies very near to the boundary line of the acceptable limits, because concerned trading agencies have to decide about the acceptance or rejection of products before their purchase or release into market for sale. Similarly in the health and medical sectors authorities have to decide to initiate the treatment of the patients on the basis of pathological tests and in environmental sectors to control the environment where permissible limits of pollutants/ constituents are in trace or ultra trace levels. Any small error/uncertainty in measurement may vitiate the cumulative effect of the action taken which has direct impact on the society. In present era of modernization many sophisticated equipment and measurement techniques are available which minimizes the errors/uncertainty in the measurements. But no technique is available for absolute measurement. Hence, all the measurement techniques and method of analysis are associated with some uncertainty value. Moreover method of analysis consists many steps of operation to measure the property value and all the steps of the method also consists some uncertainty, hence analyst has to identify and quantify all the sources of the uncertainty involved in all the steps of a particular test procedure. The combined value of all these uncertainties is termed as uncertainty in measurement. In view of this it is essential for concerned authorities to consider the uncertainty component of the measurement value before taking any decision about the acceptance or rejection of the products or initiating the medical treatment of the patients or taking steps to control the environmental pollution etc. The method of the estimation of uncertainty in chemical measurement is discussed in this paper.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Subjects:	Instruments/ Instrumentation Mathematics Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	08 Jan 2014 08:46
Last Modified:	08 Jan 2014 08:46
URI:	http://npl.csircentral.net/id/eprint/1014

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