Analytical Applications and Methods

Determine acid and salt content in plum sauce using automated titration. Accurate, reproducible analysis for food quality control.

Simultaneous determination of acetic acid and ammonium acetate using automated titration. Improve process control in semiconductor and industrial applications.

Measure lactic acid in food products to monitor fermentation, spoilage, and quality. Improve consistency and shelf life control with automated titration.

Determine citric acid purity for food additive quality control. Ensure consistent formulation, regulatory compliance, and product performance with automated titration.

The mixed solution of nitric acid and phosphoric acid works as strong acid, and also has the strong oxidizability and solvency. It is used as the surface treatment solution for metals, glass products, and semiconductors.

This report introduces an example of the fractional and successive determination for nitric acid and phosphoric acid by neutralization titration with sodium hydroxide standard solution. When nitric acid and phosphoric acid are titrated by neutralization titration using a glass electrode for pH measurement, two inflection points appear on the titration curve. The first inflection point appears as the total amount of nitric acid and phosphoric acid (reaction formula (1) and (2)). Sodium dihydrogen phosphate, which is the product of reaction equation (2), subsequently reacts with sodium hydroxide and shows an inflection point in the second stage (reaction equation (3)). Therefore, it is possible to obtain the phosphoric acid concentration from the second inflection point, and nitric acid concentration could be obtained with subtracting titration volume at the second inflection point from the first inflection point.

Boric acid is a critical buffer in nickel plating baths. Learn how automated potentiometric titration with mannitol improves accuracy, repeatability, and process control.

Copper concentration is critical to plating performance and coating quality. Learn how automated redox titration improves accuracy, repeatability, and process control in copper sulfate baths.

Nickel concentration is the most critical parameter in plating bath control. Learn how automated EDTA titration improves accuracy, repeatability, and coating consistency.

Control active tin (Sn²⁺) levels in solder plating baths to improve coating quality and prevent oxidation-related process instability.

Control hexavalent and trivalent chromium levels in plating baths to improve coating performance, reduce defects, and support environmental compliance.

Nickel chloride plays a critical role in plating bath conductivity and anode performance. Learn how accurate analysis improves process stability and coating quality.

Learn how automated potentiometric titration accurately determines the acid value of edible and cooking oils. Monitor free fatty acids, assess oil freshness, and improve food quality control with the HIRANUMA COM-A19 Automatic Titrator.