SH/T 1499.3-1997 PDF EnglishUS$70.00 · In stock · Download in 9 seconds
SH/T 1499.3-1997: Pure adipoic acid. Measurement of ammonia solution colour (in Pt - Co scale). Spectrophotometric method Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Similar standardsSH/T 1499.3-1997: Pure adipoic acid. Measurement of ammonia solution colour (in Pt - Co scale). Spectrophotometric method---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/SHT1499.3-1997 SH PETROCHEMICAL INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71.080.40 G 15 Pure adipic acid – Measurement of ammonia solution color (in Pt-Co scale) – Spectrophotometric method Issued on: JULY 12, 1997 Implemented on: DECEMBER 01, 1997 Issued by. China Petrochemical Corporation Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Method summary ... 4 4 Reagents and solutions ... 4 5 Instruments and equipment ... 5 6 Sampling ... 5 7 Analytical procedures ... 5 8 Expression of analytical results ... 6 9 Precision... 6 10 Report ... 7ForewordThis standard equivalently adopts the clause 4.4 Measurement of solution color (in Pt-Co scale) in TOCT 10558-80* (with the No.2 modification notification passed in September 1989, AND the No.3 modification notification passed in March 1992), AND the test methods of clause 2.4 Measurement of ammonia solution color in SH/T 1499-92 after review. AND it determines the precision level of 95% confidence level using the mathematical statistics method. This version was rewritten in accordance with the editing requirements of GB/T 1.1-1993, AND the chapter is fully supplemented and adjusted. This standard shall, from the date of implementation, replace the clause 2.4 Measurement of ammonia solution color in SH/T 1499-92. This standard was proposed by Liaoyang Petrochemical Company. This standard shall be under the jurisdiction of the National Chemical Standardization Technical Committee Petrochemical Technical Subcommittee. This standard is responsibly drafted by Liaoyang Petrochemical Company No.4 Chemical Factory. The main drafters of this standard. Xue Shaoju, Tang Min, Tong Enbao. This standard was first published on October 10, 1986, AND first confirmed on July 12, 1997. Pure adipic acid – Measurement of ammonia solution color (in Pt-Co scale) – Spectrophotometric method1 ScopeThis standard specifies the determination method for the solution color of the pure adipic acid ammonium solution. This standard is applicable to the determination of the solution color of the pure adipic acid ammonium solution.2 Normative referencesThe provisions in following documents become the provisions of this Standard through reference in this Standard. The versions indicated at the time of publication of this standard are valid. All standards are subjected to revision, AND parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. GB/T 601-88 Chemical reagent – Preparations of standard volumetric solutions GB/T 6678-86 General principles for sampling chemical products GB/T 6679-86 General rules for sampling of solid chemical products GB/T 6682-92 Water for laboratory use; Specifications3 Method summaryDISSOLVE the appropriate amount of the sample in the ammonia solution of a certain concentration; USE the spectrophotometer to conduct color determination at a wavelength of 390nm, and COMPARE with the platinum-cobalt standard solution; CALCULATE the sample color.4 Reagents and solutionsUnless otherwise noted, the reagents used are analytical pure, AND the water used shall comply with the level III water specifications of GB/T 6682. 4.1 Hydrochloric acid solution [c (HCl) = 0.1mol/L]. 4.2 Platinum-cobalt standard solution (500 platinum-cobalt color number). Ni – The color number of thin platinum-cobalt standard solution; Ai - Absorbance of thin platinum-cobalt standard solution; n - The number of thin platinum-cobalt standard solution. The calculation factor K shall be reviewed once every 6 months. 7.2 Determination of samples WEIGH (10.0000 ± 0.0001) g of sample; PLACE it into a 200mL beaker; ADD 95mL of ammonia (4.3), to dissolve the sample AND filter it; USE the ammonia (4.3) as a reference; at a wavelength of 390nm, USE the 5cm absorption pool to determine its absorbance.8 Expression of analytical results8.1 Calculation The solution color (X) represented by the platinum-cobalt color number is calculated in accordance with the formula (2). Where. A - The absorbance of the sample, A; K - The calculation factor. 8.2 Expression of results The arithmetic mean of the results of two repeated measurements is taken as the result of the analysis, which shall be accurate to 0.1 platinum-cobalt color number.9 Precision9.1 Repeatability The difference of results as obtained in the same laboratory by the same operator using the same instrument to conduct two repeated determination against the same sample shall be not 1 platinum-cobalt color number (95% confidence level). 9.2 Reproducibility To be determined. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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