Division 6: CALCULATION - Fourth Commission Directive of 11 October 1985 on the approximation of the laws of the Member States relating to methods of analysis necessary for checking the composition of cosmetic products (85/490/EEC)

Calculate the content of sulphite or hydrogen sulphite by mass in the sample by the expresssion:

% m/m of sulphur dioxide = \frac{3,2 MV}{m}

where

M

molar concentration of sodium hydroxide solution (3.4),

V

volume of sodium hydroxide (3.4) required for titration (5.8), in millilitres,

m

mass of sample (5.1) in grams.

Division 6 CALCULATION