SIS SS-ISO 5661-1987 石油产品.液态烃.折射指数的测定

百检网 2021-08-02
标准号:SIS SS-ISO 5661-1987
中文标准名称:石油产品.液态烃.折射指数的测定
英文标准名称:Petroleum products - Hydrocarbon liquids - Determination of refractive index
发布日期:1987/12/25 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1 This International Standard specifies a method for the determination of the refractive index of transparent and light-coloured hydrocarbon liquids such as are used in capacitors, transformers, circuit breakers and in cables of the oil-filled type.2 This method is applicable to liquids having refractive in-dices in the range 1,33 to 1,7 and at temperatures of 20 to 30 °C. It is not applicable, within the accuracy stated to liquids having colours darker than 4 colour to ISO 2049, or to liquids having bubble points so close to the test temperature that a reading cannot be obtained before substantial deterioration takes place.NOTES3 Liquid certified reference materials are available for the range 1,33 to 1,50, but not above this range. The accuracy of the method is not readily checked in the range 1,5 to 1,7.4 Although measurements may be made at temperatures up to 70 °C, the accuracy of the method under these conditions has not been evaluated.5 The refractive index of a liquid varies with its composition and with the nature and amount of contaminants held in solu-tion. If the refractive index of an unused liquid is known, deter-minations made on the same liquid after periods of service may form a basis for estimating any change in composition or the degree of contamination resulting from dissolution of extra-neous material. The refractive index may also be used, in con-junction with other physical properties, to assess the hydrocarbon types present in petroleum fractions.

百检能给您带来哪些改变?

1、检测行业全覆盖,满足不同的检测;

2、实验室全覆盖,就近分配本地化检测;

3、工程师一对一服务,让检测更精准;

4、免费初检,初检不收取检测费用;

5、自助下单 快递免费上门取样;

6、周期短,费用低,服务周到;

7、拥有CMA、CNAS、CAL等权威资质;

8、检测报告权威有效、中国通用;

客户案例展示

  • 上海朗波王服饰有限公司
  • 浙江圣达生物药业股份有限公司
  • 天津市长庆电子科技有限公司
  • 上海纽特丝纺织品有限公司
  • 无锡露米娅纺织有限公司
  • 东方电气风电(凉山)有限公司