michelborstrok

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About michelborstrok

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    Analytical chemistry
  1. Bottom ash is part of the non-combustible residue of combustion in a furnace or incinerator. https://en.wikipedia.org/wiki/Bottom_ash This will cause the decarbonation. If there remain anymore carbonates, they will decompose during the proces of making fused beads. Thanks for the English lesson though
  2. John Cuthber, It needs to be calibrated for K2O. Because in my department it is going to be used to measure bottom ash which contains a lot of different things. It is recommended to oxidize the samples before making the fused beads out of them. I have KHCO3 available here, so i need to do a loss on ignition first to burn out the H and CO2 Which brings me to the next problem because I've read that CO2 can be removed at 1200oC, which is also quite high and relates to the first problem because our normal crucibles can't handle this. StringJunkyBut does this say something about the 1065oC, I mean, will the platinum react with the potassium then? PyrineA graphite crucible might work, although my supervisor wasn't so happy about it, don't know why. I don't think the environment is inert.
  3. I have tried using Al2O3 crubibles but now the crucible reacted with the Potassium.
  4. Hello, So I'm working on this project in which I need to calibrate an XRF for multiple elements. One of the elements is potassium. I'm going to make fused beads for the calibration using the LeNeo fluxer from Claisse (it's a sample preperation method which includes heating up untill 1065oC). But there is a problem: Potassium and platina apparently react with eachother. I haven't found any literature that backs this up but multiple Phd. colleages of me said this. My question was: is there any way that i can do something about this because i really dont know what to do now. Thank you
  5. Yes, i mean the hydrated forms, and yes i mean Al2O3 but i already found that one. The only one i need toknow is SiO. I already found CaCO3 -> CaO + CO2 but there were many different temperatures on different websites. That was the reason I asked it here.
  6. Hello, I had some questions because every website on the internet said something else: At what temperature does CO2 decompose from CaCO2 and how long must it remain at this temperature? for the next 3 questions, assume that the chemicals are around for some time enableing water to bind to the surface of the chemicals. At what temperature does H20 decompose from SiO and how long must it remain at this temperature? At what temperature does H20 decompose from Fe2O3 and how long must it remain at this temperature? At what temperature does H20 decompose from AlO and how long must it remain at this temperature? And is there also a good source a can use to find these kind of things? thank you!