31. Determination of silver in silver jewellery alloys - volumetric potentiometric method using potassium bromide 32. Lithium carbonate - determination of lithium chloride content - potentiometric method 33. Methods of test for meat and meat products - determination of chloride content potentiometric method 34. Fruits , vegetables and derived products . determination of chloride content . potentiometric method 35. Determination of silver in silver jewellery alloys - volumetric potentiometric method using potassium bromide 36. Ammonium hydrogen carbonate for industrial use - determination of chloride content - potentiometric method 37. Fruit and vegetable juices - determination of chloride content - potentiometric method ; german version en 12133 : 1997 38. Essential oils . determination of the carbonyl value . potentiometric methods using hydroxylammonium chloride 39. Methods for chemical analysis of hardmetals - the potentiometric method for the determination of cobalt content 40. Methods for chemical analysis of ferrovanadium . the potentiometric method for the determination of vanadium content
