Standard No.:	GB/T 387-1990
English Name:	Dark petroleum products-Determination of sulphur content-Tubular oven method
Chinese Name:	深色石油产品硫含量测定法(管式炉法)
Chinese Classification:	E30    Petroleum products in general
Professional Classification:	GB    National Standard
Issued by:	State Technical Supervision Bureau
Issued on:	1990-12-14
Implemented on:	1991-10-1
Status:	valid
Superseding:	GB 387-1964
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	110.0
Delivery:	via email in 1 business day

1 Subject Content and Application Scope This standard specifies the tubular oven method for determining the sulphur content in dark petroleum products. This standard is applicable to the dark petroleum products with sulphur content greater than 0.1% (m/m) such as lubricating oil, heavy petroleum products, crude oil, petroleum coke, paraffin wax and sulphur-containing additives, etc. This standard is not applicable to additives containing metal, phosphorus and chlorine as well as the lubricating oil with such additives. 2 Normative References GB 1790 Medicinal Vaseline GB 6682 Water for Analytical Laboratory Use - Specification SY 2001 Sampling Method of Solid and Semi-solid Petroleum Products SY 2871 Method for Inspection of Petroleum Coke SY 3302 Technical Provisions for the Acceptance of Porcelain Containers Used for Petroleum Products Test 3 Method Summary When the sample is burning in airflow, the generated sulphurous acid anhydride is absorbed by hydrogen peroxide and sulfuric acid solution and the generated sulfuric acid will be titrated by standard sodium hydroxide volumetric solution. 4 Apparatus and Material 4.1 Apparatus 4.1.1 Tubular resistance oven: horizontal type, in a length no less than 130mm, the diameter of the oven chamber is about 22mm. A thermostat controller which ensures the temperature to be heated to 900~950 ℃ and a nickel chromium - nickel silicon (nickel chromium - nickel aluminum) thermocouple are included. 4.1.2 Porcelain boat: used for holding the sample for combustion and in accordance with the requirements for boat shaped porcelain boat used to determine the sulphur as specified in SY 3302. The new porcelain boat shall be combusted for 30min at 900~950 ℃ before use and then cool it at room temperature for standby. 4.1.3 Quartz tube: with quartz elbow (see Figure 1) and may be replaced by porcelain tube. 4.1.4 Flowmeter: used to measure the flow velocity of the supply air and with a measuring range of 0~800mL/min.

1 Subject Content and Application Scope 2 Normative References 3 Method Summary 4 Apparatus and Material 5 Reagents 6 Preparation 7 Test Procedures 8 Calculation 9 Precision 10 Report Additional Explanation: