Create a diluent solution and media consisting of Buffered Peptone Water, Lauryl Tryptose Broth (LSTB), EC Broth, Levine's cosin-methylene blue (L-EMB) agar, Methyl red Voges-Proskauer Broth (MR-VP Broth), Tryptose broth, Indicators of Methyl Red, 40% KOH
preparation for sample analysis
Prepare pipettes, tips, petri dish which has been wrapped into the autoclave
to sterilize the tools that will be used for analysis, to ensure the device does not contaminate the sample
Weigh solid and semi-solid samples of 50 grams or 50 ml liquid sample aseptically, then enter it in a sterile container.
To prepare the sample to be analyzed
Prepare decimal dilutions with Butterfield's phosphate diluent sterile or sterile BPW, number of diluent prepared depending on the density of coliform
To infer the presence of E. coli in samples
Beat all suspension 25 times or shake using a vortex for 7 seconds. Do not use a pipette to transfer
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