When performing chemical examination of urine, a routine reagent strip test for protein is based on the principle of:

When performing a chemical examination of urine a routine reagent strip test for protein is used.

This test is based on the protein error of indicators principle.

Explaination:

The reagents trips are also known as Diagnostic strips which is used for  Urinealysis. This strips are firm plastic strips in which there are different types of seperate reagent areas are fixed.They provide the information about acid base balance , urinary tract infection, kidney and liver function and carbohydrate metabolism status. The test is based on the protein error of indicators principle. There is green color formation on the strip  under a constant pH which is an indicator of the protein presence.