Novel technique for measuring salt concentrations in food using silver dichromate

Area of Science:

• Food science
• Analytical chemistry
• Food safety

Background:

• Salt curing is vital for food preservation, reducing water content and extending shelf life.
• Accurate salt concentration measurement is critical for food quality and safety.
• Existing salt measurement techniques are often impractical due to cost or speed limitations.

Purpose of the Study:

• To develop a fast, simple, and reliable method for measuring salt (NaCl) concentration in food.
• To address the limitations of current salt measurement techniques in practical food applications.

Main Methods:

• A novel method utilizing the reaction between silver dichromate and chloride ions was developed.
• Radishes were soaked in varying NaCl concentrations, and a silver dichromate layer was applied.
• Salt concentration was visualized within 5 minutes based on color changes (white for ≥1% NaCl, red otherwise).

Main Results:

• The method visually indicated salt concentrations of ≥1% as white areas within 5 minutes.
• A high correlation (r = 0.94/0.96) was found between the new method and conventional salt measurement techniques.
• The reliability and speed of the silver dichromate method were demonstrated.

Conclusions:

• The developed silver dichromate method offers a fast, simple, and reliable way to assess salt concentrations in food.
• This technique has significant potential for advancing food science research and industrial applications.
• The method contributes to improved food quality and safety through accurate salt level monitoring.