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  • ISO 2927-1973 - 中外标准 - - 1973/12 - 现行
    Details the practical requirements for taking representative samples intended for chemical analysis and determination of the physical characteristics. Applicable to products during transport, loading/unloading, contimuous flow and storage. Will be revised when general methods are available. Taking samples is carried out without reduction of particle size by manual or mechanical removal of increments of constant mass. Storage of the increments and transport at ambient temperature in closed containers. Shall remain in the same physical and chemical state in which the sample has been drawn until the time of laboratory examination. Has also been approved by the IUPAC.
    生产抽样方法氧化铝化学分析和试验化学分析抽样AluminiumAluminium oxideChemical analysis and testingProductionSamplingSampling methods
  • ISO 2925-1973 - 中外标准 - - 1973/12 - 废止
    Specifies the procedure of treatment of crude samples and dried samples. The crude sample is intended for the determination of certain geometrical characteristics and physical and physico-chemical tests including moisture determination. The dried sample is intended especially for chemical tests. The principle consists in grinding followed by sieving of the sample until the whole mass passes through a 63 m mesh sieve. Subsequent mixing and drying. The dried dample is to be stored in an airtight container of such a capacity that it is almost filled by the sample.
  • ISO 2230-1973 - 中外标准 - - 1973/12 - 作废
    Covers the most suitable conditions for the storage. Specifies temperature, humidity, light, oxygen and ozone, deformation, contacts with various materials, containers, wrapping and covering materials, rotation of stocks and cleaning.
  • ISO 2209-1973 - 中外标准 - - 1973/6 - 现行
    These methods are applicable to products not contaminated by an axtraneous phase (for example, water). Accidental pollution is also considered. Three cases are considered: small containers, large containers and continuous sampling. The procedure consists in formation of a blended bulk sample, representing the whole of the batch, by mixing several samples. The number and the method of taking of the elementary samples will depend on the number and capacity of containers.
    液体抽样方法卤化烃卤代烃抽样Halogenated hydrocarbonsLiquidsSamplingSampling methods
  • ISO 2590-1973 - 中外标准 - - 1973/5 - 废止
    Applicable to determining the quantities contained either in all the test solution or in the aliquot portion of between 1 g and 20 g that is taken for the determination. The principle bases on the reduction of the arsenic by zinc in a hydrochloric acid medium with the formation of arsine; absorption of the arsine in a solution of silver diethyldithiocarbamate in pyridine. Photometric measurement of the purplish-red colour produced by the colloidally dispersed silver at the maximum of the absorption curve at a wavelength of about 540 nm.
    化学分析光度测量法含量测定化学分析和试验光度测量法(化学分析)ArsenicChemical analysis and testingDetermination of contentPhotometryPhotometry (chemical analysis)
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