Abstract. On the basis of main provisions of ISO standards, reproducibility and repeatability in determination of measured characteristics of. Buy ISO ACCURACY (TRUENESS AND PRECISION) OF MEASUREMENT METHODS AND RESULTS – PART 6: USE IN PRACTICE OF. INTERNATIONAL STANDARD ISO ISO/TC 69, Applications of statistical methods, Subcommittee SC 6, Measurement methods.
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The reference material should have a matrix as close as possible to the matrix of the material to be subjected to the standard measurement method, e. If this is not true, the respective equations ido in IS0 should be used to calculate s. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.
Enoval – References
Exactitude justesse et fidelite des resultats et methodes de mesure. Reference materials could sio either a certified reference materials; b materials manufactured for the purpose of the experiment with known properties; or c materials whose properties have been established by measurements using an alternative measure- ment method whose bias is known to be negligi- ble.
Analytical results as percentage Mn Lab. Annexes B, C and D are for information only. You may experience issues viewing this site in Internet Explorer 9, 10 or All measurements are to be carried out according to that standard method.
If it is proposed to undertake an experiment to estimate laboratory bias, then it should be realized that the estimate will be valid only at the time of the ex- periment.
Basic method for the determination of is and re- producibility of a standard measurement method – Part 3: Genauigkeit Richtigkeit und Praezision von Messverfahren und Messergebnissen.
In order for the results of an experiment to be able to detect with a high probability see annex Cl a prede- termined magnitude of bias, the minimum number of laboratories, p, and test results, n, shall satisfy the following equation: The number of laboratories to be used is discussed in subclause 6.
The symbols used in IS0 are given in annex A. It is not applicable if the bias in the measurement of one property is affected by the level of a second property i. In the latter case, consideration should be given to repeating the experiment with verification at all steps that the standard measurement method is properly implemented. Intermediate measures of the precision of a standard measurement method – Part 4: The h values figureB.
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ISO Accuracy of measurement methods and results-Part 2 Basic method – MBA智库文档
There are three cases, as follows. Worldwide Standards We can source any standard from anywhere in the world. Calibration-different Equipment-different Identifier for a particular laboratory Identifier for intermediate measures of precision; in brackets, identification of the type of intermediate situation ldentif ier for a particular level IS0 Here B is the laboratory component of bias, i. Anwendungen in der Praxis.
BS ISO 5725-6:1994
As the voice of the U. You may find similar items within these categories by selecting from the choices below:. Basic methods for the determination of the trueness of a standard measurement method 1 Scope 1. Relevant International Standards on sample division should be consulted. The test results for each level are shown in figures B. The variation of the estimate of the bias of the measurement method is due to the variation in the results of the measurement process and is expressed by its standard deviation computed as in the case of known precision values, or siJzT-yF .
Each laboratory re- ceived two randomly selected bottles of test sample for each level and performed duplicate analyses on each bottle. Need more than one copy? The results of this computation are summarized in table B. Utilization of trueness data Refer to clause 7 of IS0 All standards are subject to revision, and parties to agreements based on this part of IS0 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
The h and k values are shown in figures B. Reference materials shall be homogeneous. You may delete a document from your Alert Profile at any time. Your basket is empty.
IAccuracy trueness and precision of measurement methods and results – Part 1: If the bias is found to be statistically insignif- icant, then the objective is to determine the magnitude of the maximum bias that would, with a certain probability, remain undetected by the results of the experiment.
ISO matallic coatints measurement of coating thickness coulometic method by anodic dissolution. If the reproducibility of the measurement method is poor, then it will not be practical to achieve a high degree of certainty in the estimate of izo bias. In the former case, the io standard devi- ation, gr, and the reproducibility standard deviation, gR, will be used for the assessment of the trueness of the measurement method.
IS0 l should be read in conjunction with all other parts of IS0including this part, because it gives the underlying definitions and general principles.