|
IS Number | |||
|
IS 2362 : 1993 |
|||
Title :-Determination of Water by Karl Fischer Method - Test Method (Second Revision) | |||
Unit Price |
Status |
Amendment |
Reaffirmed |
Gr 8 |
Active |
|
1998 |
Page Size |
No. of Pages |
Tech. Committee |
|
A4 |
17 |
CHD 1 |
|
UDC 543.812 | |||
1 Scope
1.1 This Indian Standard describes the Karl Fischer method for determination of free water or water of crystallization or moisture in solid or liquid chemical products, both organic and inorganic.
1.1.1 The method is not applicable to all the organic and inorganic chemical products. The limitations are:
a) oxidizing agents, such as chromates, dichromates, cupric and ferric salts, and higher oxides and peroxides;
b) reducing agents, such as sulphides, thiosulphates and stannous salts;
c) compounds which may form water with components of Karl Fischer reagent, namely, basic zinc oxide, salts of weak oxyacids, alkali carbonates and bicarbonates, and berates; and
d) organic compounds, such as quinines, ascorbic acid, peroxy compounds, `active carbonyl compounds, nitrogen compounds containing amino or hydrozo nitrogen, and sulphur compounds where sulphur is not bonded with oxygen. In some cases the method can be employed with minor modification before operating the final titration.
1.1.2 This standard describes electrometric method involving direct titration and the back titration.
Note - Certain reagents used, may cause health hazard and therefore they should be handled carefully.
2 Reference
IS 1070 : 1992 Specification for reagent grade water (third revision) is a necessary adjunct to this standard.