Static dissipater additives (SDAs) are conductivity improver additives that are added to aviation turbine fuels (ATFs) to avoid sudden increase in conductivity that may occur during transfer/pumping of ATF. STADIS 450 has been used globally as the SDA in aviation jet A1. The dosage of SDA into jet fuels is very closely specified (1–3 ppm). Due to surface active nature, SDA dosage may deplete with time. The monitoring of concentration of SDA is very critical and is generally carried out using conductivity measurement as per ASTM D2624 or as per liquid chromatographic technique based ASTM D7524 method entitled in “Determination of static dissipater additive (SDA) in aviation turbine fuel using HPLC technique with UV detector in the range of 1 to 12 ppm”. In this work, SDA blended ATFs in the range of 1–5 ppm have been analyzed for estimation of SDAs using both HPLC based ASTM D7524 and conductivity measurement based ASTM D2624. This paper suggests precautions that need to be taken while using the two methods. The work also recommends suggestions that can make the ASTM D7524 findings more specific and precise and ensures better recoveries. While the initial procedures were adopted from ASTM D7524, multiple collections during cartridge extraction process and use of HPLC with photodiode detector instead of UV detector bring down the detection level to 0.5 ppm of SDA in ATF.

中文翻译：

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使用ASTM D7524和ASTM D2624估算航空涡轮燃料中的静电耗散添加剂：观察，注意事项和建议

静电耗散添加剂（SDA）是电导率改善剂，已添加到航空涡轮机燃料（ATF）中，以避免在ATF的传输/泵送过程中电导率突然增加。STADIS 450已在全球用作喷气飞机A1的SDA。喷气燃料中SDA的用量非常严格（1-3 ppm）。由于表面活性的性质，SDA剂量可能会随时间耗尽。SDA浓度的监测非常关键，通常使用电导率测量（根据ASTM D2624或液相色谱技术，基于ASTM D7524方法）进行，标题为“使用HPLC技术测定航空涡轮机燃料中的静电耗散添加剂（SDA）”，紫外线检测器的范围为1至12 ppm”。在这项工作中，使用基于HPLC的ASTM D7524和基于电导率测量的ASTM D2624，都分析了1-5 ppm范围内的SDA​​混合ATF，以评估SDA。本文提出了在使用这两种方法时需要采取的预防措施。该工作还提出了一些建议，这些建议可以使ASTM D7524的发现更加具体和准确，并确保更好的回收率。尽管ASTM D7524采用了最初的程序，但在弹药筒提取过程中进行了多次收集，并使用HPLC和光电二极管检测器（而非UV检测器）一起将ATF中SDA的检测水平降至0.5 ppm。该工作还提出了一些建议，这些建议可以使ASTM D7524的发现更加具体和准确，并确保更好的回收率。尽管ASTM D7524采用了最初的程序，但在弹药筒提取过程中进行了多次收集，并使用HPLC和光电二极管检测器（而非UV检测器）一起将ATF中SDA的检测水平降至0.5 ppm。该工作还提出了一些建议，这些建议可以使ASTM D7524的发现更加具体和准确，并确保更好的回收率。尽管ASTM D7524采用了最初的程序，但在弹药筒提取过程中进行了多次收集，并使用HPLC和光电二极管检测器（而非UV检测器）一起将ATF中SDA的检测水平降至0.5 ppm。