GB/T 259-1988 PDF EnglishUS$90.00 · In stock · Download in 9 seconds
GB/T 259-1988: [Renamed from GB 259-1988] Petroleum products. Determination of water-soluble acids and alkalis Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
GB/T 259-1988: [Renamed from GB 259-1988] Petroleum products. Determination of water-soluble acids and alkalis---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT259-1988 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA UDC 665.52 .543.06 Replacing GB 259-1977 Petroleum products - Determination of water-soluble acids and alkalis Issued on: MARCH 14, 1988 Implemented on: MARCH 01, 1989 Issued by. China Petrochemical Corporation Table of ContentsForeword... Error! Bookmark not defined. 1 Summary of methods... 3 2 Instruments... 3 3 Reagents and materials... 3 4 Preparation... 4 5 Test steps... 4 6 Precision... 6 7 Report... 6 3.1.2 Phenolphthalein. Prepare it into a 1% phenolphthalein ethanol solution. 3.1.3 95% ethanol. Analytically pure. 3.2 Materials 3.2.1 Filter paper. Industrial filter paper. 3.2.2 Solvent oil. It meets the NY-120 requirements in GB 1922 “Solvent oil”. 3.2.3 Distilled water. It meets the requirements for the grade III water in GB 6682 “Water for laboratory use - Specifications”.4 Preparation4.1 Preparation of specimen. 4.1.1 Place the specimen in a glass bottle, no more than three-quarters of its volume. Shake if for 5 min. Viscous or paraffin specimen shall be preheated to 50 ~ 60 °C before being shaken. 4.1.2 When the specimen is grease, use a blade to scrape off the surface layer (3 ~ 5 mm) of the specimen. Then at least three places not close to the wall of the container, take about the same amount of specimen. Place it into the porcelain evaporating dish. Use a glass rod to carefully stir it uniformly. 4.2 The 95% ethanol can only be used after checking by the use of methyl orange and phenolphthalein indicator, or pH meter to confirm that it is neutral.5 Test steps5.1 When testing the liquid petroleum products, place 50 mL of specimen and 50 mL of distilled water in a separatory funnel. Heat it to 50 ~ 60 °C. Light petroleum products such as gasoline and solvent oil do not need heating. For the petroleum products which has a kinematic viscosity greater than 75 mm2/s at 50 °C, first mix it with 50 mL of gasoline at room temperature. Then add 50 mL of distilled water which is heated to 50 ~ 60 °C. Gently shake the test solution in the separatory funnel for 5 min. It is not allowed for emulsification. Discharge the lower aqueous layer after clarification. Use filter paper to filter it into a conical flask. 5.2 When testing the grease, paraffin waxes, ceresin waxes, wax-containing components, take 50 g of pre-melted specimen, weight it to 0.01 g. Place it in a porcelain evaporating dish or conical flask. Then inject 50 mL of distilled water. test tube which contains the same volume of distilled water and methyl orange solution. If the extract is rosy, it means that there are water-soluble acids in the petroleum product tested. In the second tube which contains the extract, add 3 drops of phenolphthalein solution. If the solution is rosy or red, it indicates the presence of water-soluble alkalis. When the extract uses the methyl orange or phenolphthalein as an indicator and it does not exhibit rosy or red color, it is considered that there is no water- soluble acids or alkalis. 5.5.3 When there is an inconsistency in the quality evaluation of petroleum products, the arbitration test of water-soluble acids or alkalis is carried out according to 5.5.1.6 Precision6.1 The provisions on the precision applies only to the pH meter method. 6.2 The difference between the two results proposed by the same operator shall not be greater than 0.05 pH.7 ReportTake the arithmetic mean of the two pH values from repeated determination as the test result. Additional information. This standard shall be under the technical jurisdiction of the Petrochemical Science Institute. This standard was drafted by the Petrochemical Science Institute. This standard refers to and adopts the Soviet national standard TOCT 6307-75 ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 259-1988 be delivered?Answer: The full copy PDF of English version of GB/T 259-1988 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 259-1988_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 259-1988_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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