The content of chloride (salt) in food stuffs is determined by titration using the electrode Ag Titrode with an Ag2S coating by a so-called precipitation titration with potentiometric detection
Salt (sodium chloride) is an essential ingredient in practically all food for human consumption and, apart from its nutritional and physiological importance, above all, gives the food in question its pleasant taste.
It is generally known that the salt content in a foodstuff with a certain flavour cannot be reduced beyond a certain extent without losing the characteristic taste and the food being rejected as tasteless.
The regular daily diet of a human being contains approximately 3-5grams salt.
This amount is adequate to maintain good health and the physiological activities of the human body.
Depending on eating habits, salt consumption is, however, often in excess of 10grams per day.
On the other hand, it is known that excessive salt consumption through food intake can have extremely detrimental effects on the human circulatory system, resulting, above all, in high blood pressure and kidney affections.
There is, therefore, an urgent need for a reduction in human salt consumption, not only to cure existing illnesses with a low-salt food diet but also to take preventive measures in healthy human beings.
The chloride ions in the sample solution are titrated with a silver nitrate solution (titrant), leading to precipitation of silver chloride due to its low solubility product.
As soon as there are no more chloride ions present in the sample solution, adding more titrant results in free silver ions and hence a rapid change in the measured potential at the Ag-Titrode.
The amount of salt in the foodstuff is determined from the first endpoint of the titration curve.
The Salt Titrino offers a complete working package, which includes titrator, electrode, stirrer and burette.
The parameters of each instrument have been optimised to ensure fast, accurate and reproducible results - with the minimum of fuss.
Virtually all the keys are locked out to stop any unwanted changes to parameters and results.
These instruments are ideal for process laboratories, and also when this type of analysis is performed by unskilled operators, for example.
