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Protein food test strip, This product is strictly for use in education and training. It is not for medical use Detects residual protein in water in increments of 0.3, 1.0, 3.0, 10.0 plus g/L A quick, easy, and completely safe means to analyze the chemical composition of food Just dip the test strip into the sample, wait briefly for the color to develop and compare it with the chart on the bottle Read the results in less than a minute