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Folks; I am looking for mercury specs adopted in the oil and gas industry. Does anybody know maximum values established for natural gas, LPG and naphtha, for example ? Regards, Luiz Silva

I agree with you. I will try to figure out another sample point as suggested. Thanks.

I will check sample system arrangement with ASTM D1265 as suggested. I personally guess that most part of our issue is the problematic stream to be analysed. It is a two phase stream (C1-C6)which makes a representative sample vey difficult to succeed. Since mercury tend to concentrate in tha gas...

We use UOP 938 method. Sampling is performed with stainless steel PTFE bomb (stainless steel bombs were formerly used in the past). Analysis is also performed according JLPGA-S-07. We also tried direct sampling with tedlar bags. Total Hg values vary from 0,2 to 800 micrograms/m3 but we believe...

Thanks Ivanovic. The issue we are trying to overcome is Hg analysis inconsistency in LGP: the same sample varies its result if done in duplicate or three times. We also have trouble trying to sample a gás-liquid phase stream (C1 to C6).

Does anybody have experience with sampling LPG for mercury analysis ? We have had repetibility problems with marcury analysis in LGP and wonder how sampling care would help on that.