Chapter 45, Problem 2SAQ

Summary Introduction

To explain: The ways in which the right amount of water sample to be filtered is determined. The reasons why this determination is important to the test result.

Introduction: Membrane filtering technique involves filtering a known volume of the sample using a special filter. It is sterile and made of nitrocellulose acetate. The water sample is filtered through the membrane and the filter is transferred to a solid media to detect the number of bacterial colonies.