Questions about flame photometers
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I’ve encountered problems in other places; those who know how to fix them are welcome to help! (1) What is the purpose of adding AlCl3-H2SO4 solution when using a flame photometer to measure sodium? Should it be added when preparing the standard curve as well? (2) What is the linear range when using a flame photometer to measure sodium? The teachers at our school say it’s around 0.5 ppm, but according to the \"Alumina Analysis Manual\", the amount of sodium oxide per milliliter is 0.10, 20, 40, 80, or 100 micrograms – there’s a huge difference. What’s going on?
Aluminum chloride is used as a clarifying agent to ensure that the light emitted by the solution is solely the flame light of sodium ions. Because the sensitive element of the flame photometer only detects the light emitted by sodium combustion. 0.5ppm should be the detection limit. The linear range is generally up to 100 ppm.