Fertilizers mineral

4.2 Near infrared spectroscopy method
4.2.2 The calibration procedure given in Appendix B can be used for graduation
automatic action. Part 1. Metrological and technical requirements. Tests
4.1.3 The parameters of the mode for measuring the mass fraction of moisture (temperature and drying time,
sample weight), selected taking into account the provisions of Appendix A, are experimentally confirmed when
introducing the methodology into laboratory practice, and then, if necessary, set in the methods for measuring the
mass fraction of moisture in mineral fertilizers and middlings for IR TG moisture meters of a specific type.
GOST OIML R 76-1-2011 State system for ensuring the uniformity of measurements. Libra is not
4.1.2 IR TG moisture meters of different types are characterized by different sources of IR radiation, their
geometry, radiation power; range and accuracy of maintaining the temperature in the working chamber; range and
weighing error. A feature of the IR TG method is the need to set the parameters of the measurement mode
(temperature and drying time, sample weight) that ensure complete removal of moisture (Appendix A) from the
analyzed substance without its decomposition, as well as the absence of a systematic shift between the arithmetic
mean results of measurements of the mass fraction of moisture, obtained by arbitration and IR TG method.
GOST 6709-72 Distilled water. Specifications GOST 20432-83
Fertilizers. Terms and definitions GOST 20851.4-75 Mineral
fertilizers. Methods for determination of water GOST 21560.0-82 Mineral fertilizers.
Methods for sampling and sample preparation GOST 29027-91 Moisture meters for solids
and granular substances. General technical requirements and test methods
of the analyte before and after drying under the action of infrared radiation.
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