Smartphone-based determination of pH after reaction with a chemically bound pH indicator
The pH value of milk and milk products is one important parameter when checking the quality of milk. E.g., the pH value of fresh milk should lie between 6.6 - 6.8. A higher pH value indicates a mastitis infection in the cow and a pH of below 6.5 indicates towards acidification of the sample.1
A quick and easy way to check the pH of milk and milk products is using test strips. In combination with your smartphone, you get fast, convenient, and precise results. This low-priced and easy-to-use analytical detection system provides reliable quantification of water, food & beverage samples in research, industries, environmental analyses, and diagnostics.
The following application note describes the determination of the pH level of milk and milk products using the MQuant® pH test strips in combination with the MQuant® StripScan App.
Special indicator dyes that are covalently bound to the reagent papers, change their color depending on the pH value of the sample.
The sample can be analyzed in its original form.
For the analysis, follow the below steps:
Comparison with visual evaluation, Reflectoquant® pH test (1.16894), and pH electrode seen in Table 1.
The MQuant® pH strip in combination with the MQuant® StripScan app provides quick and easy determination of pH of milk and milk products. The measured values are comparable to those measured with the Reflectoquant® system and the pH electrode.
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