Bacteriological analysis water

Bacteriological analysis must be carried out immediately after sampling, or the sample of water must be suitably preserved. 

Simple bacteriological analysis, determining the total bacterial count per 1 ml, testing for Escherichia coli and coliform bacteria per 100 ml water in each case. 

MF is used in bacteriological analysis of municipal waters and waste treatments. The identification of coliform bacteria in water indicates fecal contamination and the possible presence of pathogenic enteric organisms, which are responsible for causing... 

Water samples to be analyzed should be collected in sterilized 1 L plastic bottles or borosilicate glass precleaned and rinsed with distilled or deionized water. Samples should be unfiltered and unpreserved, except if chlorinated in which case 0.01% v/v sodium thiosulfate should be added. The sample should be kept at 4°C until it is ready for analysis usually within 24 h of collection. Information on equipment to be used for bacteriological analysis, types of media to use, and their methods of preparation and storage can be found in APHA [2] and the British Columbia Environmental Laboratory Manual [16]. 

Water analysis for drinking-water supplies is concerned mainly with pollution and bacteriological tests. For industrial supplies a mineral analysis is of more interest. Table 2.11 includes a typical selection and gives some indication of the wide range that can be found. 

In the condition of sanitary-chemical laboratory and the bacteriologic one of National Scientific and Practical Center of Preventive Medicine and Municipal Center of Preventive Medicine Chisinau after the standardized methods there was accomplished the sample analysis of water from aqueducts, the well from Chisinau and suburbs as well. There were determined the following indicators turbidity, ammonia, nitrite, nitrate, total dissolved solid, concentration of fluoride, hardness, content of calcium, magnesium, K+Na, chloride, sulfate, carbohydrate, iron, NTG, coliform bacterium. 

This collection of methods for "Water Analysis" contains instructions for conducting the necessary local investigations, samplings and physicochemical, radiochemical, biological or bacteriological analyses. The expert user will be able to summarize from these methods the right range of analytical methods for each application. 

Small-scale mineral water analysis. In this type of analysis, the main components of a mineral water should be determined quantitatively and detailed bacteriological investigations should be conducted. 

Comprehensive mineral water analysis or medicinal water analysis. In this analysis, all substances contained in the water should be determined, as far as they are qualitatively detectable and quantitatively recordable according to the latest advances in analytical chemistry. Tests should also be made to see whether anthropogenic substances, such as halocarbons, pesticides, etc., can be detected in the trace range. In addition, bacteriological investigations, tests for radioactivity and, where applicable, radiochemical analyses and gas analyses are necessary. 

Ground water samples should nearly always be taken from appropriate wells or boreholes uncovered ground water will only exist in rare cases. According to the scope of investigation planned, samples should also be taken here for bacteriological, physico-chemical and chemical analyses. The taking of water samples may be necessary for trace analysis and for examina-... 

Water is a living element, housing many organisms— wanted or unwanted, harmful or harmless. Some of these organisms produce toxic substances. Chapter 4 and Chapter 5 discuss bacteriological and algal analysis. 

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