Comparing E331III - Trisodium citrate vs E337 - Potassium sodium tartrate
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Popular questions
Is trisodium citrate bad for you?
No—trisodium citrate (E331iii) is widely used as a food acidity regulator and is considered safe at typical food levels (JECFA ADI: “not specified”); those on sodium-restricted diets or consuming very large amounts should be mindful of the added sodium and possible mild stomach upset.
What is trisodium citrate dihydrate?
It’s the hydrated crystalline form of trisodium citrate (Na3C6H5O7·2H2O); it functions the same in foods as a buffer/chelating agent, with the water of crystallization only affecting dosing by weight.
What is trisodium citrate used for?
In foods it serves as an acidity regulator/buffer and emulsifying salt (especially in processed cheese), and as a chelator that controls tartness and helps prevent oxidation; it’s also used to stabilize flavors in beverages.
During sample preparation, why must the solutions be buffered with trisodium citrate?
Citrate buffer maintains a controlled pH and chelates multivalent metals, helping prevent precipitation or oxidation and stabilizing analytes during preparation.
Fe during sample preparation, why must the solutions be buffered with trisodium citrate?
For iron analyses, citrate complexes Fe2+/Fe3+ and holds the pH where ferric hydroxide won’t precipitate, reducing losses and interferences from other metals.
E337 sodium potassium tartrate is in what foods?
It’s used as a sequestrant and stabilizer in some beverages (e.g., soft drinks and juices), jams/jellies, sugar syrups and confectionery, and occasionally in processed fruits/vegetables or baking mixes; look for E337 on ingredient lists.
How to grow potassium sodium tartrate crystal?
Dissolve the salt in hot water to make a saturated solution, then let it cool or evaporate slowly to form crystals; larger crystals grow best from a clean seed crystal and in low humidity because Rochelle salt is deliquescent.
How to prepare potassium sodium tartrate?
It is produced by neutralizing tartaric acid with sodium and potassium bases (e.g., carbonates) and crystallizing the tetrahydrate (Rochelle salt). For food use, obtain food‑grade E337 rather than attempting home preparation.
How to prepare potassium sodium tartrate solution from sodium and potasium tartarate?
Simply dissolve sodium tartrate and potassium tartrate together in water to the desired concentration; in solution this is effectively potassium sodium tartrate, while isolating the true double salt requires crystallization from an equimolar mix.
How to prepare potassium sodium tartrate solution from sodium and potassium tartrate?
Dissolve appropriate amounts of sodium tartrate and potassium tartrate in water to reach your target strength; the mixed ions give a solution equivalent to potassium sodium tartrate, though the double salt forms only on crystallization.