喷气燃料冰点的测定方法

综述国内外喷气燃料冰点测定方法的进展、原理及国内相应标准化接轨的情况。美国喷气燃料标准ASTM D1655-07e规定可以采用标准试验方法ASTM D2386-06、自动相转移法ASTM D5972-05、自动激光法ASTM D7153-05、自动光纤法ASTM D7154-05等4种方法中的任何一种测定喷气燃料冰点，且规定ASTM D5972-05、ASTM D7153-05为仲裁方法；国外其它主要国家的喷气燃料标准也允许使用这些冰点的测定方法，但规定只有ASTM D2386-06或其等效标准为仲裁方法；中国3号喷气燃料标准GB6537—2006规定采用标准试验方法GB/T 2430-2008和相转移法SH/T 0770-2005测定喷气燃料冰点，指定GB/T 2430-2008为仲裁方法。ASTM D5972-05，ASTM D7153-05，ASTM D7154-05为近年来新发展的仪器分析方法，自动化程度较高，测定重复性好。另外还简单介绍了一些正在研究但没有标准化的喷气燃料冰点的测定方法。

TEST METHODS FOR DETERMINING FREEZING POINT OF JET FUEL

The progresses, principles and correlations among methods for determining freezing point of jet fuel are presented. According to the appointment of the national standard ASTM D1655-07e for jet fuel, in United States test methods including conventional ASTM D2386-06, automatic phase transfer ASTM D5972-05, automatic laser ASTM D7153-05 and automatic fiber optic ASTM D7154-05, are all qualified to be used alternatively for determining freezing point of jet fuel, in which only ASTM D5972-05 and ASTM D7153-05 can be used as arbitration methods. The above four test methods are also being used for determining the freezing point of jet fuel in other countries, yet only ASTM D2386-06 and its equivalent can be used as arbitration methods. In China, based on the requirement of national standard GB 6537—2006 for 3# jet fuel, test method GB/T 2430-2008 and SH/T 0770-2005, which is equivalent to ASTM D2386-06 and ASTM D5972-05 respectively, are now used for determining the freezing point of jet fuel and GB/T 2430-2008 is the arbitration method. ASTM D5972-05, ASTM D7153-05 and ASTM D7154-05 are highly automatic instrumental methods developed recently; they are relatively easy to be operated and having good reproducibility. Other methods for measuring freezing point of jet fuel in research or under standardizing are also outlined briefly.