Silicalite, either method gave the same % CE values. For Silicalite, a simple CHzClz extraction failed to remove sufficient organic material for analysis. For this zeolite, we found that a simple MeOH extraction gave the same % CE values as from a Soxhlet extraction. Analysis of AA, AB, and BB ratios were carried out by using a Varian Aerograph 3700 gas chromatograph. To check for possible intercon- version of AA, AB, and BB on the zeolite, a known mixture of ...