Monday, Aug 08, 2016 at 17:02
Sandman, the reason is - lemon cordial generally contains a lesser % of lemon juice, as compared to proper lemon juice. 50% lemon juice, according to Cottees website.
Funnily enough, they add citric acid to the cordials as an anti-oxidant - and the primary source of commercial citric acid is - yes, you guessed it! - lemons! LOL
The red cordial is called raspberry cordial - but of course, it contains not a skerrick of raspberry, or raspberry juice!
It actually contains citric acid, sodium benzoate (the sodium salt of benzoic acid), sodium metabisulphate, along with additional sodium sulphite as a preservative. Carmoisine, a common food colouring, is the cordial colouring ingredient.
It's the acids that do all the cleaning work - citric and sodium benzoate in particular, are very effective at cleaning up corrosion, and sodium metabisulphate is often added to cooling system cleaners!
Cottees cordials - click for ingredients
Vinegar, as recommended by tazbaz below, can also be very effective. Vinegar is around 6% acetic acid, and acetic acid is noted as an effective cleaner.
A lot depends on what chemical is causing the taste or odour problem. Esters that are still being released from the plastic are a common problem - but sometimes the plastics manufacturers add other chemicals to the plastics mix to try to mask the undesirable chemicals smell or taste.
Cheers, Ron.
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