CALDO DE LAURIL SULFATO MERCK - 500g
Modelo: 1102660500
-
R$488,77
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Descrição
LAURYL SULFATE BROTH GRANULADO (LST) MERCK
RENDIMENTO 35,5g/L
EMBALAGEM 500G
Selective culture medium used as a presumptive test for coliform bacteria and for the selective enrichment of coliform organisms in the analysis of water, according to MALLMANN and DARBY (1941).
This medium complies with the APHA Recommendations for Water Examination (1998) and the ISO 5541-2 (1996) for milk and milk products.
Mode of Action
The high nutrient quality and the presence of phosphate buffer in this medium ensure rapid growth and increased gas production of even "slowly lactose-fermenting" colifirm bacteria. Gas formation can be detected by using fermentation tubes. The lauryl sulfate largely inhibits the growth of undesired bacteria.
Typical Composition (g/litre)
Tryptose 20.0;
lactose 5.0;
sodium chloride 5.0;
sodium lauryl sulfate 0.1;
di-potassium hydrogen phoshate 2.75;
potassium dihydrogen phosphate 2.75.
Preparation
Suspend 35.6 g/litre or more, dispense into test tubes fitted with DURHAM tubes, autoclave (15 min at 121°C).
pH: 6.8 ± 0.2 at 25 °C.
The prepared broth is clear and yellowish-brown.
RENDIMENTO 35,5g/L
EMBALAGEM 500G
Selective culture medium used as a presumptive test for coliform bacteria and for the selective enrichment of coliform organisms in the analysis of water, according to MALLMANN and DARBY (1941).
This medium complies with the APHA Recommendations for Water Examination (1998) and the ISO 5541-2 (1996) for milk and milk products.
Mode of Action
The high nutrient quality and the presence of phosphate buffer in this medium ensure rapid growth and increased gas production of even "slowly lactose-fermenting" colifirm bacteria. Gas formation can be detected by using fermentation tubes. The lauryl sulfate largely inhibits the growth of undesired bacteria.
Typical Composition (g/litre)
Tryptose 20.0;
lactose 5.0;
sodium chloride 5.0;
sodium lauryl sulfate 0.1;
di-potassium hydrogen phoshate 2.75;
potassium dihydrogen phosphate 2.75.
Preparation
Suspend 35.6 g/litre or more, dispense into test tubes fitted with DURHAM tubes, autoclave (15 min at 121°C).
pH: 6.8 ± 0.2 at 25 °C.
The prepared broth is clear and yellowish-brown.
