Who are the experts in ICP analysis? Please advise
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Everyone, who is an expert in ICP analysis? I would appreciate your advice: when using ICP to determine the contents of calcium oxide, aluminum oxide, and silicon dioxide in liquid sodium hydroxide, should the standard addition method or the standard curve method be used? Please ask for the specific steps to follow. Thank you first.
I haven’t used an ICP instrument myself, but for testing the contents of 32% alkali, the standard addition method is used in accordance with the specifications in GB/T11200.2–GB/T10020.3. These standards are available on forums. This post was last edited by Xiaoxiao Yushui on 2009-4-14 at 21:12
I haven’t used an ICP instrument either, so I’m not quite familiar with some of the terms. In the standard addition method, does a set of standard solutions refer to blended standards? Prepare mixed standard solutions at 10 ppm each.
Simply put, it works like this: without changing the matrix, the sample is analyzed. If the content of the sample is A, then the standard series consists of values such as A, A+10, A+20, A+40, and so on. The goal is to address the interference caused by matrix effects
I’ve also never worked with IPC. If you don’t have any experience with it but still want to use it, you can ask the suppliers; they’ll be happy to assist you. As for the standard addition method and the standard curve method, from an HPLC perspective, their basic principles are similar; both rely on a series of standard samples to determine the value of the unknown sample, with the requirement of having standard samples at different concentrations for reference.
Either method is acceptable; beginners should preferably use the standard addition method, as neutralizing the base generates a large amount of salt, which affects the atomization efficiency. The standard addition method makes it easier to achieve consistency in the matrix. When using a standard curve, the same salt (sodium chloride) as that in the sample should be added to counteract the matrix effect.
Thank you all; I now have a basic understanding. I will test and compare using two more methods.