Calibration & Standards
Check-standards contain a range of routine and challenging analytes, and are useful when setting up instrumentation or troubleshooting. Markes supplies two types of check-standard, both prepared on conditioned Tenax TA sorbent tubes.

Instrumentation check-standards contain benzene, toluene, o-xylene, isobornyl methacrylate (IBMA) and dioctyl phthalate at a nominal concentration of 90 ng/μL for each component. A single check-standard is supplied with all Markes’ systems. Replacement check-standards are available in packs of 10.

Material emissions check-standards enhance validation and quality control for service and manufacturing labs using TD–GC(MS) to test chemical emissions from products and materials. The Tenax TA sorbent tubes are pre-loaded in the gas phase with a range of polar and non-polar VOCs ranging in volatility from C6 (n-hexane) to C16 (n-hexadecane), at a nominal loading of 100 ± 10 ng per compound. The standard complies with the ISO 17025 method for loading tubes (also in accordance with ISO 9001).
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