Comparing E922 - Potassium persulfate vs E923 - ammonium persulfate
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Popular questions
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.
What is ammonium persulfate used for?
As E923, it has been used as a flour treatment/bleaching agent, though its authorization for food use is limited and varies by country (not permitted in the EU/UK). Outside food, it’s a strong oxidizing initiator used in polymerization, etching, and hair-bleaching products.
What products contain ammonium persulfate?
You may rarely find it in some flours where permitted, labeled as ammonium persulfate or E923; many regions no longer allow it in food. It’s more commonly present in hair-bleach powders, lab reagents (e.g., gel electrophoresis), and PCB etchants.
5. what aspects of your experiment are controlled by temed and ammonium persulfate?
TEMED and ammonium persulfate generate free radicals to initiate and control the rate of acrylamide polymerization, which affects gelation time and pore size/uniformity in gels. Handle both with care—they are irritants and strong oxidizers.
Ammonium persulfate how to make solution?
For food use, consumers should not be preparing solutions of E923; its food authorization is limited. In labs it’s typically dissolved freshly in water because it decomposes—follow your protocol and the SDS for concentrations and safety.
Ammonium persulfate how to make solution cu?
Copper etching with ammonium persulfate is an electronics application, not a food use; follow the product manufacturer’s instructions for concentration and temperature and observe oxidizer safety. Food use of E923 is restricted and not permitted in the EU/UK.