BS 5688-29:1986
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Methods of test for orthoboric acid (boric acid), diboron trioxide (boric oxide), disodium tetraborates, sodium perborates and crude sodium borates for industrial use Determination of total and alkali-soluble calcium and magnesium contents of crude sodium borates (titrimetric method)
Hardcopy , PDF
01-12-2011
English
31-07-1986
Gives a titrimetric method for the determination of the total and alkali soluble calcium and magnesium contents of crude sodium borates for industrial use. Procedures are described for special cases for determination of total calcium to eliminate interference by silica, iron or aluminium. Also applicable to products in which the calcium content, expressed as calcium, is not lower than 0,01% (m/m) and not greater than 1,0% (m/m), and in which the magnesium content, expressed as magnesium, is not lower than 0,01% (m/m) and not greater than 0,2% (m/m). Includes sections on references, principle and reagents.
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