ASTM D 5454, D 1142, D 2713. The last one is required only on commercial and special duty propane types of LP gas. The problems in sampling for moisture content, especially in the range of 10 ppm, are hard to overcome.
Thank you very much for your information. Are those methods ( ASTM D-5454, D-1142 and D-2713 ) suitable for anykind of gas ? because I will use this method for measuring water content in the mix gas ( about H2 73 % and CO 27 % ).
Have you method to measuring oil content in the gas phase ?