Comparing E300 - Ascorbic acid vs E922 - Potassium persulfate
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Interest over time for 4 keywords in U.S. during the last 10 years.
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Popular questions
Is ascorbic acid bad for you?
No—ascorbic acid (vitamin C) is considered safe at typical food levels and is essential for health; it’s GRAS in the U.S. and approved in the EU. Very high supplemental doses can cause gastrointestinal upset and, in susceptible people, increase kidney stone risk.
Can dogs have ascorbic acid?
Yes, small amounts in foods are safe, but dogs synthesize their own vitamin C and usually don’t need supplements. High doses may cause diarrhea, so consult a veterinarian before supplementing.
What is ascorbic acid made from?
Commercial ascorbic acid is typically made from glucose (often derived from corn, wheat, or cassava) that’s converted via microbial fermentation and chemical steps into L‑ascorbic acid.
How is ascorbic acid made?
Industrially, D‑glucose is converted to 2‑keto‑L‑gulonic acid by fermentation (or via the older Reichstein process: glucose → sorbitol → L‑sorbose → 2‑KGA) and then chemically cyclized to ascorbic acid. Modern methods use two-step fermentation to improve efficiency.
Is ascorbic acid the same as citric acid?
No—ascorbic acid (E300) is vitamin C and an antioxidant, while citric acid (E330) is a different compound mainly used as an acidulant and does not provide vitamin C.
How much potassium persulfate do i put in a phosphorus digestin?
Use the amount specified by a validated phosphorus digestion method (e.g., Standard Methods 4500-P or EPA 365.x), as the required mass depends on sample volume and reagent strength; persulfate oxidant solutions are typically prepared at a few grams per liter and added in small aliquots.
How much potassium persulfate do i put in a phosphorus digestion?
Follow a published method because the dose depends on protocol and sample size; many standard formulations use roughly 4–10 g K2S2O8 per liter in the digestion reagent, but defer to your method’s exact instructions.
How much potassium persulfate do i put in a phosphorus digestion in gram?
It’s method-dependent; as a rough reference, some persulfate digestion reagents contain on the order of 4–10 grams of potassium persulfate per liter and are used at milliliter-scale additions to the sample—always follow the specific procedure in your method.
How to dispose of potassium persulfate?
Treat potassium persulfate as a strong oxidizer: do not pour it down the drain; collect unused solid and concentrated solutions in a labeled, compatible container kept away from organics/reducing agents and arrange disposal through your institution’s hazardous-waste program per the SDS and local regulations.
If an experiment calls for 110 ul of potassium persulfate, what size pipetman should you use?
Use a P200 (20–200 µL) pipettor for 110 µL; a P100 is too small and a P1000 will be less accurate at that volume.