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SH/T 1499.2-1997 PDF English

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SH/T 1499.2-1997: Pure adipic acid. Determination of content. Titrimetric method
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SH/T 1499.2-1997: Pure adipic acid. Determination of content. Titrimetric method

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SH PETROCHEMICAL INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71.080.40 G 15 Pure adipic acid – Determination of content – Titrimetric method Issued on: JULY 12, 1997 Implemented on: DECEMBER 01, 1997 Issued by. China Petrochemical Corporation

Table of Contents

Foreword ... 3 1 Scope ... 4 2 Normative reference ... 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 ... 5 9 Precision... 6 10 Report ... 6

Foreword

This standard equivalently adopts the clause 4.3 Determination of the adipic acid mass fraction in TOCT 10558-80* (with the No.2 modification notification passed in September 1989, AND the No.3 modification notification passed in March 1992) “Adipic acid – Technical conditions”, AND the test methods of clause 2.2 Determination of contents in SH/T 1499-92 after review. This standard uses the hot boiling water to substitute the isopropyl alcohol-water mixed solvent to dissolve sample, AND uses the potassium hydrogen phthalate to substitute the oxalic acid to calibrate the concentration of the sodium hydroxide standard solution, in order to obtain satisfactory results. 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 2.2 Determination of content 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 Shanghai Petrochemical Research Institute. The main drafters of this standard. Jiang Liwen, Tang Qimin. This standard was first published on October 10, 1996, AND first confirmed on July 12, 1997. Pure adipic acid – Determination of content – Titrimetric method

1 Scope

This standard specifies neutralization titration method for the determination of adipic acid content. The results include other acidic substances in the product, so this standard is only applicable to the determination of the adipic acid content in high purity products.

2 Normative reference

The 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; Specifications

3 Method summary

After the sample was dissolved in fresh boiled hot water, USE the phenolphthalein as indicator and the sodium hydroxide standard titration solution to titrate the solution to make it change from colorless to reddish.

4 Reagents and solutions

Unless 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 Sodium hydroxide standard titration solution [c (NaOH) = 0.5mol/L]. It is prepared and calibrated in accordance with the technical requirements of GB/T 601. 4.2 Phenolphthalein indicator solution (10g/L). WEIGH 1.0g of phenol phthalate; DISSOLVE it into 100mL of ethanol. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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