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ISO 22935-1¦IDF 99-1 gives general guidance for the recruitment, selection, training, and monitoring of assessors for sensory analysis of milk and milk products.

It specifies criteria for the selection, and procedures for the training and monitoring, of selected assessors and expert sensory assessors for milk and milk products. It supplements the information given in ISO 8586-1 and parts of ISO 8586-2 that deal with expert sensory assessors.

ISO 22935-2|IDF 99-2 specifies recommended methods for the sensory evaluation of specific milk and milk products. It specifies criteria for the sampling and preparation of samples and the assessment of the samples.

ISO 22935-2|IDF 99-2 is suitable for application in conjunction with the sensory methodologies outlined in ISO 22935-1|IDF 99-1 and other ISO or IDF sensory methodologies for specific situations and products.

ISO 22935-3¦IDF 99-3 gives guidance on a general method for evaluation of compliance with product specifications for sensory properties based on sensory scoring and the use of a common nomenclature of terms.

The method is especially applicable in process and quality control performed regularly on a larger number of samples and/or with some time pressure and/or with a limited number of expert assessors available.

The results from the method may be part of product classification systems for domestic and international trade. Classification systems are not covered by ISO 22935-3¦IDF 99-3.

This document is applicable to the determination of the total silicon content in gaseous matrices such as biomethane, biogas and landfill gas. Silicon is present in a gas phase contained predominantly in siloxane compounds, trimethylsilane and trimethylsilanol. The analytical form of the silicon measured in liquid phase after conducted sampling and derivatization procedure is soluble hexafluorosilicate anion stable in slightly acidified media. Total silicon is expressed as a mass of silicon in the volume of the analysed gas. This document is applicable to all stated gas matrices with silicon concentrations up to 5 mg/m3, and it is prevalently intended for the biomethane matrices containing (0,1 to 0,5) mg/m3. It can be used for higher concentration but then the absorption efficiency of the bubblers/impingers should be checked before the results can be regarded as valid. The detection limit of the method is estimated as 0,05 mg/m3 based on a sample volume of 0,020 m3. All compounds present in the gas phase are volatile at the absorption and derivatization temperature and gaseous siloxanes are trapped in absorbance media and derivatized into analytical silicon specie are measured by this method. The concentration of the silicon is measured in diluted derivatization media using atomic emission spectrometer upon atomisation/ionisation in microwave or inductively coupled plasma.

This document specifies the characteristics of cold formed cylindrical helical extension springs and determines the measurement and test methods.