Ringer's Solution (1/4 strength)

LAB 100 LAB 100Z (TABLETS)

Description

An osmotically controlled solution for the preparation of suspensions of food samples and for use as a diluent in dilution techniques for bacterial enumeration. The solution can also be used in the sampling of food production apparatus by the rinse and swab method.

References

Min. of Health, (1937). Bacteriological Tests for Graded Milk. Memo 139/Foods. H.M.S.O. London. Davis, J.G. (1956). Laboratory Control of Dairy Plant. Dairy Industries, London. Higgins, M. (1950). Comparison of recovery rate of organisms from cotton wool and calcium alginate wool swabs. Mon. Bull. Min. Health, P.H.L.S., 9: 50-51.

Method for reconstitution

LAB 100 - Dissolve 2.5 grams of powder in 1 litre of deionised water, when completely dissolved dispense into containers as required and sterilise by autoclaving at 121˚C for 15 minutes.

LAB 100Z - Dissolve 1 tablet in 500ml of deionised water. Proceed as for LAB 100.