This method is for determining the concentration of total sodium (both dissolved and suspended sodium compounds) in liquefied petroleum gas in the range of 0.1 to 10 mass-ppm.
ASTM UOP699-91 history
2009ASTM UOP699-09 Sodium in Liquefied Petroleum Gas by AAS
1991ASTM UOP699-91 Sodium in Liquefied Petroleum Gas by AAS