Product category:
Materials Testing
News Release from: Metrohm UK | Subject: Titration
Edited by the Manufacturingtalk Editorial
Team on 18 September 2006
Titration for salt in pasta
determination
The content of chloride and cooking salt in pasta is determined by titration using the electrode Ag Titrode with an Ag2S coating.
Pasta mainly contains milled wheat, water, eggs (for egg noodles) and sometimes optional ingredients as salt Prior to analysis, some pasta has to be finely ground in a laboratory cross-beater mill with a cooling jacket
This article was originally published on Manufacturingtalk on 24 Jan 2008 at 8.00am (UK)
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The content of chloride and cooking salt in pasta is determined by titration using the electrode Ag Titrode with an Ag2S coating.
The analysis is a so called precipitation titration with potentiometric detection.
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.
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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 chloride/cooking salt in pasta is determined from the first endpoint of the titration curve.
The recommended titrator is the:- Food Titrino - complete package for the analysis of foodstuffs The Food Titrino offers you a complete package for all the usual analyses in the food industry.
Apart from almost 100 ready-to-use determination methods with detailed documentation you will also receive the accessories needed for your titrations including the electrode Ecotrode Plus.
The Metrohm Food Titrino is a compact titrator with an LCD screen for real-time curve display.
It is intended for universal use as it offers all the important basic methods used in practice.
With the Food Titrino you have the possibility of storing your titration methods not only in the instrument's internal memory, but also on a memory card, which makes them transportable.
This card ensures that all your laboratories work with the same method.
Operation via the backlit LCD screen in seven selectable dialog languages is extremely easy.
The connection of a PC keyboard and/or a barcode reader (options) is very advantageous and helps avoid errors when alphanumerical sample data have to be entered or read in.
The The increasing number of foodstuff quality labels appearing on the market demonstrate that quality is the decisive purchasing factor.
We know this, which is why we support you in maintaining your standards.
Together with the Food Titrator you will receive detailed and easily understandable explanations concerning the qualification of your titrator and the validation of your method.
This means that you are always on the safe side; your results will stand up to any test.
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