Standard No.:	SH/T 0251-1993
English Name:	Determination of base number of petroleum products (perchloric acid potentiometric titration method)
Chinese Name:	石油产品碱值测定法（高氯酸电位滴定法）
Chinese Classification:	E30    Petroleum products in general
Professional Classification:	SH    Professional Standard - Petrochemical
Issued by:	Sinopec Group
Issued on:	1993-6-11
Implemented on:	1992-5-20
Status:	valid
Superseding:	SH/T 0251-1992
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	150.0
Delivery:	via email in 1 business day

1 Subject Content and Application Scope This standard specifies the determination of base number in test specimen by potentiometric titration with perchloric acid. The method specified in this standard includes forward titration and back titration, and Procedure A and B are used in each kind of titration. Note: as for additives, new and used oils, the test shows that the two procedures give statistically equivalent results. The test shall be judged according to Procedure A. This standard is applicable to determining the basic constituents in petroleum products, used oils and additives. These constituents include organic and inorganic bases, amino compounds, salts of weak acids (soaps), basic salts of polybasic acids and salts of heavy metals.

1 Subject Content and Application Scope 2 Normative References 3 Terms 4 Method Summary 5 Significance 6 Apparatus 7 Reagents 8 Preparation Works 9 Test Procedures 10 Precision 11 Report Appendix A Examination Method for Base Number of Petroleum Products (Indicator Method) (Reference) Additional Explanations