Determination of Coliforms and Fecal Coliforms Using Lauryle Sulfate Tryptose Broth (LST) in Multiple Tube Fermentation Method

The source and storage conditions of raw material is different, so there may be a slight difference in color, which is a normal phenomenon. Products from our company have to undergo a rigorous inspection and sensory biology verification before sale, to ensure that all the indicators characteristics of the product is under enterprise standard to the extent permitted, not affect the test results.

The reason may be: The required hydration in the preparation process have not been done completely. That is to say distilled water is not boil sufficiently to dissolve agar. Because agar proportion, easily settle in the bottom of the bottle, if not fully shaken after high-temperature sterilization, it will lead to uneven upper agar culture gene content and difficult to set.

During anaerobic or micro-aerobic culture, using method of gassing agent should be done according to the manufacturer's instructions. Remove the paper bag from the plastic packaging, but do not cut the paper bag. Torn the outer packaging of oxygen indicator then it can be used.

Always a pre-production sample before mass production; Always final Inspection before shipment;

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