The application method of pH meter in dairy product testing
How to clean dairy products after using an acidity meter, and how to clean general protein and high protein foods. When measuring different media or working in different environments, the situation of electrode contamination varies, so the cleaning method will be analyzed in detail. There are several types of cleaning methods for pH meters. Be careful during the process, as glass pH electrodes are generally used to measure such substances. Clean the sediment left on the electrode:
When testing general dairy protein:
Soak in hydrochloric acid solution with 1 gastric protease (HCl concentration of 0.1mol/L) for 15 minutes, or soak in 10% sodium hypochlorite solution for 5 minutes. Afterwards, clean with pure water and soak in 3.3mol/L KCL electrode soaking solution for 12 hours to maintain a balanced electrode potential. This can restore its original activity, if
Soak the electrodes in dishwashing detergent for 1 hour. Remove the electrode and rinse it thoroughly, then soak it in gastric protease solution for 4 hours. Preparation method for gastric protease solution: Mix 5% gastric protease 0.5MOL/L hydrochloric acid solution in a 1:1 ratio* Afterwards, take out the electrode, clean it with distilled water, and soak it in a 3mol/L (accurately 3.3mol) KCL solution for later use. The electrode should also be filled with 3MOL/L KCL solution to avoid drying up
Dairy products have the characteristics of high protein and fat content, which can easily cause blockage of the electrode glass ball capillary. An electrode in normal use may experience slow response and unstable readings after about three months; In order to save usage costs and allocate resources reasonably.
Because acidity meters are widely used in the dairy industry. Especially in the testing of semi-finished and finished products, it plays a very important role, and such pH values reflect the quality status of the tested substance. If the accurate pH value cannot be measured in a timely manner for production reference, it will have an immeasurable impact on production.
