1results about How to "Stable retention time" patented technology

The application discloses a method for detecting the concentration of formic acid in high-concentration sulfuric acid by high performance liquid chromatography, and belongs to the technical field of concentration detection. The method comprises the following steps: establishing a formic acid standard curve, filtering a sample through an acid-resistant filter membrane, directly injecting the sample, and detecting and calculating the formic acid content by using high performance liquid chromatography. The method is suitable for a 4-8 M sulfuric acid system, and can realize effective separation and accurate quantification of formic acid in a high-sulfate background. The method is simple in operation, and is suitable for rapid detection of formic acid in an industrial process and a complex reaction system.