GB/T 2539-2023 Determination of melting point of petroleum wax — Cooling curve method

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Card type: Test method

Note: The original body text was extracted from the source-text extraction/ text layer, with severe noise; most clause numbers, numerical values, reagent specifications, and instrument parameters cannot be reliably identified. Wherever the original text cannot be confirmed below, it is marked as "not provided in the available source" or "requires confirmation against the source standard (source-text extraction)", without inferential completion.

1. Method number / full title / English name / replacement relationship

• Standard number: GB/T 2539—2023 (inferred from file name GBT-2539-2023 and year number; a clear standard number is not provided in the available source body text; requires confirmation against the source standard (source-text extraction))
• Chinese name: Determination of melting point of petroleum wax — Cooling curve method (inferred from file name; a clear Chinese name is not provided in the available source body text; requires confirmation against the source standard (source-text extraction))
• English name: not provided in the available source
• Replacement relationship: The original text contains wording related to "replacement" (source-text extraction fragment "replacement"); the replaced standard number is not provided in the available source; requires confirmation against the source standard (source-text extraction)

2. Scope of application and non-applicability

• The original text shows the section title "Scope" (source-text extraction fragment "Scope").
• Specific scope of application, applicable wax types, melting point range, and non-applicable situations: not provided in the available source (source-text extraction noise makes the body text illegible; requires confirmation against the source standard (source-text extraction)).

3. Method principle

• The original text shows a section title related to "Method principle" or "Principle" (source-text extraction fragment "Principle").
• Principle body text: not provided in the available source (source-text extraction noise makes it illegible; requires confirmation against the source standard (source-text extraction)).

4. Reagents and materials (purity / preparation)

• The original text shows a section title related to "Reagents and materials" (source-text extraction fragments "Reagents" and "Materials").
• Specific reagent names, purity, and preparation methods: not provided in the available source (source-text extraction noise makes them illegible; requires confirmation against the source standard (source-text extraction)).

5. Instruments and equipment

• The original text shows a section title related to "Instruments and equipment" (source-text extraction fragments "Instruments" and "Equipment").
• Specific instrument names, specifications, and precision: not provided in the available source (source-text extraction noise makes them illegible; requires confirmation against the source standard (source-text extraction)).

6. Recommended operating conditions

• The original text shows a section title related to "Operating conditions" (source-text extraction fragments "Operating" and "Conditions").
• Specific conditions such as temperature, cooling rate, and stirring: not provided in the available source (source-text extraction noise makes them illegible; requires confirmation against the source standard (source-text extraction)).

7. Sampling and test specimen preparation

• The original text shows section titles related to "Sampling" and "Test specimen preparation" (source-text extraction fragments "Sampling", "Test specimen", and "Preparation").
• Specific sampling amount and preparation steps: not provided in the available source (source-text extraction noise makes them illegible; requires confirmation against the source standard (source-text extraction)).

8. Analytical procedure

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• Specific steps: not provided in the available source (source-text extraction noise makes them illegible; requires confirmation against the source standard (source-text extraction)).

9. Qualitative and quantitative determination and calculation formulas

• The original text shows section titles related to "Calculation" and "Expression of results" (source-text extraction fragments "Calculation" and "Results").
• Specific calculation formulas and result expression methods: not provided in the available source (source-text extraction noise makes them illegible; requires confirmation against the source standard (source-text extraction)).

10. Precision

• The original text shows the section title "Precision" (source-text extraction fragment "Precision").
• Specific values for repeatability limit r and reproducibility limit R: not provided in the available source (source-text extraction noise makes them illegible; requires confirmation against the source standard (source-text extraction)).

11. Report

• The original text shows a section title related to "Report" (source-text extraction fragment "Report").
• Report content requirements: not provided in the available source (source-text extraction noise makes them illegible; requires confirmation against the source standard (source-text extraction)).

12. Normative references

• The original text shows a section title related to "Normative references" (source-text extraction fragment "Normative references").
• Specific referenced standard numbers and names: not provided in the available source (source-text extraction noise makes them illegible; requires confirmation against the source standard (source-text extraction)).

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick Q&A