Standard Methods For The Examination Of Water And Wastewater

Author: American Public Health Association
Publisher: Theclassics.Us
ISBN: 9781230398730
Size: 65.50 MB
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ... equal to the content of sulfate (S04). SODIUM, POTASSIUM, AND LITHIUM. Evaporate to dryness the filtrate from the precipitation of barium sulfate. Add a few cubic centimeters of hot water and then a saturated solution of barium hydroxide until a slight film collects on the top of the solution. Filter and wash the precipitate with hot water. Add to the filtrate an excess of ammonium hydroxide and ammonium carbonate solution. Filter, evaporate the filtrate to dryness, dry, and ignite at low red heat to expel ammonium salts. Repeat the operations including the addition of barium hydroxide until no precipitate is obtained by barium hydroxide or by ammonium hydroxide and ammonium carbonate. Evaporate the final filtrate to dryness in a weighed platinum dish, dry, cool, Potassium 59 and weigh the residue. Dissolve the residue in a few cubic centimeters of water, filter, wash the filter paper twice with hot water, then ignite the filter paper in the platinum dish. Cool and weigh the residue. Subtract this weight from the first weight including the residue. The difference is the weight of the chlorides of sodium and potassium and lithium. If it is not desired to separate sodium and potassium the weight of sodium and potassium as sodium may be calculated from this difference by multiplying it by 0.394. POTASSIUM. First procedure.--Add to the solution of the chlorides of sodium and potassium a few drops of dilute hydrochloric acid (1 to 3) and 1 cc. of 10 per cent platinic chloride (PtCU) for each 30 mg. of the combined chlorides. Evaporate to a thick syrup on the water bath, then remove dish and allow it to come to dryness at laboratory temperature. Treat the residue cold with 80 per cent alcohol and filter. Wash the precipitate with 80 per cent...

Water Quality Assessments

Author: Deborah V Chapman
Publisher: CRC Press
ISBN: 0419215905
Size: 62.81 MB
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This guidebook, now thoroughly updated and revised in its second edition, gives comprehensive advice on the designing and setting up of monitoring programmes for the purpose of providing valid data for water quality assessments in all types of freshwater bodies. It is clearly and concisely written in order to provide the essential information for all agencies and individuals responsible for the water quality.

Microbiological Examination Of Water And Wastewater

Author: Maria Csuros
Publisher: CRC Press
ISBN: 1351431625
Size: 21.22 MB
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Microbiological tests have proven to be an indispensable part of environmental contaminant detection. It has also been tremendously difficult to find a comprehensive training manual and laboratory manual for those procedures. Microbiological Examination of Water and Wastewater now provides that much-needed resource for laboratory trainees and environmental professionals alike. An all-inclusive guide to applications and techniques of microbiological testing, Microbiological Examination of Water and Wastewater includes coverage of General Microbiology, Environmental Microbiology, Environmental Microbiology Laboratory, plus Techniques and Methods in Routine Environmental Microbiology Laboratory. By exploring the fundamentals of microbiology, as well as microbial metabolism, growth, control, and classification, trainees will better understand the purpose and manner of microbiological examination. Those details also make Microbiological Examination of Water and Wastewater ideal as a standard guidebook for laboratories, water and wastewater treatment plants, and the communities they serve.

Microbiological Examination Methods Of Food And Water

Author: Neusely da Silva
Publisher: CRC Press
ISBN: 0203168399
Size: 17.37 MB
Format: PDF, Mobi
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Microbiological Examination Methods of Food and Water is an illustrated laboratory manual that provides an overview of current standard microbiological culture methods for the examination of food and water, adhered to by renowned international organizations, such as ISO, AOAC, APHA, FDA and FSIS/USDA. It includes methods for the enumeration of indicator microorganisms of general contamination, indicators of hygiene and sanitary conditions, sporeforming, spoilage fungi and pathogenic bacteria. Every chapter begins with a comprehensive, in-depth and updated bibliographic reference on the microorganism(s) dealt with in that particular section of the book. The latest facts on the taxonomic position of each group, genus or species are given, as well as clear guidelines on how to deal with changes in nomenclature on the internet. All chapters provide schematic comparisons between the methods presented, highlighting the main differences and similarities. This allows the user to choose the method that best meets his/her needs. Moreover, each chapter lists validated alternative quick methods, which, though not described in the book, may and can be used for the analysis of the microorganism(s) dealt with in that particular chapter. The didactic setup and the visualization of procedures in step-by-step schemes allow the user to quickly perceive and execute the procedure intended. This compendium will serve as an up-to-date practical companion for laboratory professionals, technicians and research scientists, instructors, teachers and food and water analysts. Alimentary engineering, chemistry, biotechnology and biology (under)graduate students specializing in food sciences will also find the book beneficial. It is furthermore suited for use as a practical/laboratory manual for graduate courses in Food Engineering and Food Microbiology.