Tur'yan Y I, Strochkova E, Berezin O Y, Kuselman I, Shenhar A
The National Physical Laboratory of Israel, Danziger A. Building, The Hebrew University, Givat-Ram, Jerusalem 91904, Israel.
Talanta. 1998 Sep;47(1):53-8. doi: 10.1016/s0039-9140(98)00031-9.
A new pH-metric method without titration has been developed for determination of acid numbers lower than 0.1 mg (KOH) g(-1) (oil) in petroleum oils such as White, Transformer and Basic oils. The method is based on rapid and complete extraction of acids from an oil test portion into the novel reagent and measurement of the conditional pH in the ;oil-reagent' mixture by a glass electrode. The method has a quantitation limit equal to 1x10(-3) mg (KOH) g(-1) (oil), uses non-toxic reagents, is not time and labor consuming, and is cheap and simple for automation.
已开发出一种无需滴定的新型pH测量方法，用于测定白油、变压器油和基础油等石油产品中酸值低于0.1mg（KOH）g⁻¹（油）的情况。该方法基于将油样中的酸快速完全萃取到新型试剂中，并通过玻璃电极测量“油 - 试剂”混合物中的条件pH值。该方法的定量限为1×10⁻³mg（KOH）g⁻¹（油），使用无毒试剂，不耗时且不费力，成本低且便于自动化操作。
