Barium by LPG

Hi All,
I will highly appreciate if could provide me the following information.
I have a flame photometer i would like to measure barium in waters(100 to 200 ppm).
My instrument runs only with LPG. The MP of Barium 1850 deg C Will it possible to Ionise Barium with LPG.
With LPG how much temperature can acheive with a compressor 10 psi.

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