Our WaterWorks™ Protein Check water quality test strip allows amino acids and proteins, such as Albumin, to be quickly and easily detected in solution. This strip was originally developed in the medical industry as a protein urine test. The indicator, Tetrabromophenol Blue, is very sensitive to protein concentrations. A citrate buffer is used to buffer the indicator and a pH shift is directly proportional to the concentration of the protein present. Albumin is used to calibrate the color chart. WaterWorks™ Protein Check water quality test strips are sure to meet all of your protein testing needs.