Institute for Interlaboratory Studies

GASES
Internet: www.iisnl.com	Proficiency testing schemes
Email: iisnl@sgs.com	for Petroleum and Petrochemical Products:

* To see the actual scopes of all previous PT's, you may be interested to download the available PT reports from our webpage 'News and Reports'.

Proficiency testing scheme	Provisional Scope	ID
Natural Gas (Methane)	Methane, Ethane, Propane, iso-Butane, n-Butane, Carbon dioxide, Nitrogen and Physical properties.	iis17S01M
Liquefied Butane	Propane, Propene, iso-Butane, n-Butane, 1-Butene, iso-Butene, trans/cis-Butene, 1,3-Butadiene, iso-Pentane and Physical properties.	iis17S02B
Liquefied Propane	Ethane, Propane, Propene, iso-Butane, n-Butane, 1-Butene, iso-Butene, n-Pentane and Physical properties.	iis16S03P, iis17S03P