Inorganic analytical chemistry methods

Determination of the sulfate content requires the preliminary hydrolysis of galac-tans by the action of 1 M HC1 at 100 °C for 6 h (hydrolysis in 2 M trifluoroacetic acid can also be used for simultaneous determination of monosaccharides and sulfate). Quantitative estimation of sulfate in hydrolyzates can be performed by many methods known from inorganic analytical chemistry,218,219 but the most popular procedure in the case of galactans is turbidimetry of stabilized suspensions of BaSO.4. It was suggested in the early 1960s220 and is widely used at present in the slightly modified form.221... 

It is customary in analytical chemistry to examine unknown samples by a screening procedure using a multicomponent method like OES or MS in case of inorganic constituents on the one hand and GC or HPLC in case of organic constituents on the other. In this way, an overview can be obtained on the type of constituents and their approximate contents. In many cases it is necessary to get a deeper insight into the sample composition. For this reason, the one or a few constituents have to determine more precisely. 

D.Bezier, "Methodes Modemes d Analyse Quantitative Min rale, Masson Cie, Paris(1955) l6)W.W.Meinke, Science 121, 177-84(1955) and Rus translation by N.G. Polianskii, UspekhiKhimii 15,770-80(1956) (Trace element sensitivity , comparison of activation analysis with other methods) 17)G.Charlot D.Bezier, "Quantitative Inorganic Analysis, translated from the French by R.GMurray, Methuen Co, London (19 57), 295 9 18)L.Meites, H.C.Thomas R.P.Bauman "Advanced Analytical Chemistry, McGraw-Hill,NY( 1958), 344-69 19)... 

Analytical chemistry develops methods for determining identity and quantity of the components in a sample physical chemistry develops unifying theories and laws for all of chemistry inorganic chemistry studies the properties of all elements except carbon organic chemistry studies compounds based on carbon biochemistry studies chemical processes in living organisms. 

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