IntroductionAn acid-base indicator is a substance that changes color as the pH of the solution changes. Indicators work because they are weak acids which when in solution, exist in equilibrium with ...

IntroductionAn acid-base indicator is a substance that changes color as the pH of the solution changes. Indicators work because they are weak acids which when in solution, exist in equilibrium with ...

According to major petroleum industry leaders, thermometric acid number by ASTM D8045 provides the highest accuracy for analysis of acid number in refinery fractions and crude oils. 2 The advantages ...