Calculation of the chlorinity

The method described here covers practically the entire range of chlorinities occurring in natural seawater. With correct calibrations and some experience, the standard deviation is 

In the classic gravimetric method the sulphate is precipitated and weighed as barium sulphate. Although it has been applied to seawater for more than 150 years, the method is still preferred because of its high precision and the minimum amount of equipment required to perform the determination. The procedure by Bather and Riley (1954) is described here in detail. 

A potentiometric back-titration method of excess barium ions following precipitation as BaS04 (Mucci, 1991) is outlined in Section 11.2.5.6. 

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Fig. 11.12 ONIOM model used in calculations of the chlorine KIE on DhlA catalyzed reaction (Lewandowicz, A., Matsson, O., Paneth, P., et al. J. Am. Chem. Soc. 123, 4550 (2001))...

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