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Descripción del producto
WATER CONTROL: ABSENCE/PRESENCE OF COLIFORMS ( E. COLI)
125 mL bottle, made of PET, with white ribbed tamper evident cap made of PP. It contains dehydrated culture medium in order to detect the presence of coliforms in human consumption, industrial or leisure water (pools,…). Sterile by radiation. It allows the water testing directly on a bottle. The culture medium is based on chromogenic substrates, which make possible the coliform reading; and complemented with fluorogenic substrates, which presumptively identify the presence of E. Coli.
Process:
1. A sample of water shall be taken in a sterile bottle, without additives, or with a neutralising (like thiosulfate) in case of chlorinated water.
2. A part of the sample (100 mL) is to the bottle containing the dehydrated culture medium and then shake gently until dissolved.
3. Incubate for 24 hours at 37ºC.
4. After incubation, the colour will reveal the results:
A Yellow: the sample is negative for non enteric bacteria, total coliforms and E. Coli.
B Muddy yellow: the sample is positive for enteric bacteria (not coliforms)
C Turquoise blue: the presence of total coliforms is confirmed
5. to discard escherichia place the sample under a UV light in a dark environment; if the sample gets fluorescent it contains E.coli; if there is not fluorescency, then it is another coliform, not E. coli.
Every case includes two boxes with ten bottles each.
Products are sold in full boxes. Please ask us for lower quantities.
ADITIONAL INFORMATION
