Example Problem: Impurities in polymerization grade Ethylene and propylene.

Ethylene and propylene producers are faced with product concerns.  The most common impurities (see Table 1) are monitored both on-line for process control and in the laboratory for product quality.

Calibration and routine validation of these systems are primary issues.  All of these chemicals are reactive and/or polar, and do not store reliably as static mixtures in cylinders.  This makes it extremely difficult, if not impossible, to know the accuracy of the standards being dispensed by these cylinders.

Table 1
	COS	H2S	Total Sulfurs	Ethylene
	Propylene	Arsine	CO	CO2
	Acetylene	Methanol	Other Oxygenates	H2O

Solution: KIN-TEK’s FlexStream™ and 491Flex™ Series Laboratory Standards Generator or Span Pac™ I Series Industrial Standards Generator provide calibration standards for all these compounds, using KIN-TEK’s NIST-traceable Trace Source™ disposable or refillable permeation tubes.

Benefits include:

1. The standards are generated fresh, eliminating the storage/deterioration problem inherent in gas cyclinders..
2. KIN-TEK’s permeation tubes improve the accuracy of the analysis.
3. Our instruments easily generate span gases for span checks or multi-point calibrations.