Dolomite analysis
Thread Content
I was wondering if anyone has encountered a situation where, when analyzing dolomite or limestone, the values of CaO and MgO calculated in reverse exceed 100. Could someone explain this to me? Thank you
I don’t know what the measured content is; theoretically, it should not exceed 56.03%. If I use the EDTA titration method for analysis, there are two reasons for this: 1. The purity level of the reference reagent is insufficient. It can be replaced. 2. Impurities in distilled water are above the standard. A reagent blank can be used for subtraction. 3. The concentration of the standard solution is inaccurate. It can be recalibrated.
In addition to considering these points raised by the poster, it is also necessary to consider whether there are substances with a molecular weight lower than that of the substance being measured that could cause interference
First, find a standard sample and use it to do it; if that doesn’t work, you can simply prepare one using chemical reagents on your own
Do you know what the specific components are within the stone? Night contains other impurities as well, such as calcium sulfate and calcium carbonate. How can you calculate that? It’s impossible to do an exact calculation; only approximate values can be obtained
Upstairs, if what you say is true, then there’s no need for rock and mineral analysis – it’s impossible to produce a report with just approximate figures.
Just do what needs to be done. I mean, it’s impossible to push it back; there will definitely be errors if you try to do that. Since there are impurities present, it’s not possible to determine the molecular weight accurately. I’m not very expert in this area. I’ve encountered this situation before as well – the percentage value ends up being over 100%