Fertilizers mineral

5.8 Measurement error control
Checking the Acceptability of Measurement Results Obtained under Reproducible Conditions
If CDog5 is exceeded, find out the reasons for exceeding R and eliminate them.
and the value of the error.
measurements according to table 1.
5.6.3
The numerical value of the measurement result must end with a digit of the same digit as
<5 = \W - id.
GOST 8.613-2012
where o R is the standard deviation of reproducibility for the corresponding range from
A - the boundaries of the absolute measurement error for the corresponding range according to the table
5.7.2
The result of the control procedure is considered satisfactory if
(4)
where R, r are the limits of reproducibility and repeatability, respectively, for a given range of measurements, while
where W is the result of measurements of the mass fraction of moisture obtained according to 5.6, %;
ce 1, %.
moisture, %, calculated by the formula
The compatibility of the final measurement results obtained by the two laboratories is checked by comparing the
absolute difference between the two average measurement results with the critical difference CD0 95, calculated by the formula
I/± A, %,
The result of the control procedure e is an estimate of the error in the result of measurements of the mass fraction
verification of their acceptability according to 5.6.2.
5.7.1 The result of measurements of the mass fraction of moisture for P = 0.95 is presented as:
The error control of the measurement results obtained by the IR TG method is carried out by one of the following
methods: - using the
comparison method; - using standard samples
of similar composition. 5.8.1 Control using the method of comparison The
role of the means of control is performed by working samples. The
arbitrage method is used as a Wc comparison technique. The error control of the results of measurements of the mass
fraction of moisture using
the comparison procedure consists in comparing the results of control measurements of the same sample obtained by
the controlled method - W and by the comparison procedure (arbitration procedure) - Wc .
Acceptability Checks for the acceptability of measurement results1) are carried out when the measurement results are
received by two laboratories. At the same time, samples for performing measurements must be homogeneous, their number
must be prepared with the reserve necessary for possible repeated measurements. Each laboratory receives the results of
two consecutive determinations and conducts a review.