BS 6200-3.28.3:1995

This standard BS 6200-3.28.3:1995 Sampling and analysis of iron, steel and other ferrous metals. Methods of analysis. Determination of sulphur is classified in these ICS categories:

• 77.080.01 Ferrous metals in general

This International Standard specifies a methylene blue spectrophotometric method for the determination of sulfur in steel and iron.

The method is applicable to sulfur contents between 0,000 3 % (m/m) and 0,010 % (m/m). However, niobium, silicon, tantalum and titanium interfere in the determination of sulfur.

Depending on the concentration of the interfering elements, the application ranges and test portion masses given in Table 1 apply.

Table 1

Maximum allowable content of the interfering elements				Test portion	Application ranges Δws
% (m/m)					% (m/m)
Nb	Si	Ta	Ti	g
0,5	1,0	0,3	1,0	1,0	0,000 3 to 0,001 0
1,0	2,0	0,6	2,0	0,50	0,001 0 to 0,010

Applicable to sulphur content of between 0.0003% (m/m) and 0.010% (m/m) depending upon the niobium, silicon, tantalum and titanium content.