GB/T 47357-2026Determination of the melting point and drop melting point of Fischer-Tropsch wax - Differential scanning calorimetry (English PDF)

1 Scope

This document describes a method for determining the melting point and dropping point of Fischer-Tropsch waxes using differential scanning calorimetry (DSC). The melting point determination range is [range missing].

The melting point range is 55.0°C to 80.0°C; the dropping melting point range is 75.0°C to 115.0°C. For measurements outside this range, refer to this method, but the precision will not be guaranteed.

Verification is required.

This document applies to the determination of the melting point and dropping point of Fischer-Tropsch synthetic waxes.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 6425 Terminology for Thermal Analysis

GB/T 6678 General Rules for Sampling of Chemical Products

GB/T 6679 General Rules for Sampling of Solid Chemical Products

JJG936 Verification Procedure for Differential Scanning Calorimeter

3 Terms and Definitions

The terms and definitions defined in GB/T 6425 and the following terms and definitions apply to this document.

4 Method Overview

Differential scanning calorimetry was used, and the test was conducted by heating and cooling the sample under inert gas protection. The flow rate of the inert gas was set as follows.

The heating rate of the furnace body is measured, and the relationship between the difference in heat flow rate between the sample and the reference material and temperature or time is determined to obtain information about the sample's melting or...