ASTM D4928-2012
利用电量计卡耳费歇尔滴定法对原油中水的标准试验方法

Standard Test Method for Water in Crude Oils by Coulometric Karl Fischer Titration


 

 

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标准号
ASTM D4928-2012
发布日期
2012
实施日期
废止日期
国际标准分类号
75.040 (Crude petroleum)
发布单位
US-ASTM
适用范围

5.1x00a0;The accurate analysis of a crude oil sample to determine the water content is important in the refining, purchase, sale, or transfer of crude oils.

1.1x00a0;This test method covers the determination of water in the range from 0.02 to 5.00 mass or volume % in crude oils. Mercaptan (RSH) and sulfide (Sx2212; or H2S) as sulfur are known to interfere with this test method, but at levels of less than 5008201;x03bc;g/g [ppm(m)], the interference from these compounds is insignificant (see Section 6).

1.2x00a0;This test method can be used to determine water in the 0.005 to 0.02 mass % range, but the effects of the mercaptan and sulfide interference at these levels has not been determined. For the range 0.005 to 0.02 mass %, there is no precision or bias statement.

1.3x00a0;This test method is intended for use with standard commercially available coulometric Karl Fischer reagent.

1.4x00a0;The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5x00a0;This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see Section 8.





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