Fertilizers mineral
Near infrared spectroscopy method
Download 5.52 Mb. Pdf ko'rish
|
GOST 8.613-2012
6 Near infrared spectroscopy method
LCL is missing. The limits of action UCL and LCL1) are calculated by the formula 6.1 Measurement ranges and error characteristics of the results of measurements of the mass fraction of moisture where 1.96 is the distribution quantile at P= 0.95. UCL \u003d D2 (2) og \ u003d 2.834 og GOST 8.613-2012 5.8.3.4 Filling in and interpretation of Shewhart's control charts When constructing Shewhart's control charts, the result of the control procedure is plotted along the ordinate axis w - when implementing the control of the repeatability stability, ÿ - when implementing the control of the stability of the error; the date of the analysis is plotted along the abscissa. A possible violation of the stability of the process of measuring the mass fraction of moisture is evidenced by the appearance on the control chart of at least one of the following features: one point went beyond the limits of action; all points in a row are on the same side of the midline; six increasing (decreasing) points in a row. In this case, it is necessary to check compliance with the storage conditions for samples prepared for the analysis of mineral fertilizers, sample preparation and measurements, as well as the operating conditions of the IKTG moisture meter. where n is the number of parallel definitions. (13) Vn foot two. 5.8.3.3 Parameters of Shewhart control charts for error stability control To calculate the parameters of control charts for control of calculation error stability yut standard deviation of the error a according to the formula In formulas (11) and (12), the coefficients 0 2 are given for the number of parallel determinations equal to LCL = 12. (14) Warning Limits: 6.1.1 The method of NIR spectroscopy provides measurement results of the mass fraction of moisture in mineral fertilizers and middlings with relative errors, the values of which do not exceed those indicated in Table 2. (12) UCL^fn Machine Translated by Google chiv the number of points for calibration to reduce the error in the construction of the GC moisture meter. Download 5.52 Mb. Do'stlaringiz bilan baham: |
Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©fayllar.org 2024
ma'muriyatiga murojaat qiling
ma'muriyatiga murojaat qiling