Environmental Proficiency Testing

The Sigma-Aldrich RTC brand represents over 20 years of experience and expertise in providing environmental PT studies worldwide. We produce and distribute over 20,000 high-quality samples per annum for more than 2,500 participants in our schemes. Our quality products and services allow you to work smarter, enabling us to live in a safer and healthier world.

Want to learn more about our new Proficiency Testing Portal in-person? Visit us in Booths 2318/2319 at Pittcon 2019 and learn how our high standards match yours.
Register Your Lab and Submit Your PT Results

 Environmental PT Schemes

Water Analysis Schemes
PT programs for water analysis, our schemes cover:
WP-Water Pollution PTs
WS-Water Supply PTs


Soils / Solids Analysis Schemes
PT programs for soils and solids analysis, our schemes cover:
LPTP - Solids matrices Inorganics PTs
LPTP - Solids matrices Organic PTs
MIC - Solids/Soils Microbiologial PTs


Air Analysis Schemes
PT programs for air and emissions analysis. We offer a range of schemes covering: inorganics, metals, volatiles and semi-volatiles testing.
AIR schemes here.


Specialty : Country-Specific PTs
PT programs for specific countries needs, our schemes cover:


Microbiology Schemes
PT programs for microbiology analysis. We offer a range of schemes using our innovative Vitroids™ technology.
MIC samples for PT here.


Underground Storage Tank (UST)
PT programs for UST analysis covering inorganics and organics testing. We offer standard UST sample as well as state-specific schemes.


Pharmaceutical Analysis Schemes
PT programs for pharmaceutical analysis. We offer a range of Quick-Turn studies (on-demand PT).
PEP studies here.


Contact Us
Request a quotation or new PT scheme here. If you require technical assistance, you can contact a PT specialist at RTCPTGroup@sial.com.