Molecular Sieve 5A / 13X
Molecular sieve packed columns easily separate permanent gases at above-ambient temperatures. The two most common molecular sieves used are 5A and 13X. Molecular sieve 5A and 13X packings differ in pore size and composition, causing differences in retention and selectivity for many gases. The 5A packing provides greater retention, which improves the separation of argon, oxygen, and nitrogen, and is a better choice for analyzing the trace impurities in inert gases typically used in the semiconductor industry. The 13X packing often is preferred for analysis of carbon monoxide, particularly at trace concentrations, because lower retention results in sharper chromatographic peaks and improved detection limits.
Molecular Sieve Packed Columns
Molesieve
OD
ID / mm
Mesh
Length / m
1.0 2.0 3.0
Molesieve 5A Molesieve 13X
60/80 80/100
1/8”
2.1
Molecular Sieve Micropacked Columns
Molesieve
OD
ID / mm
Mesh
Length / m
1.0 2.0
Molesieve 5A Molesieve 13X
1/16”
1.0
80/100
Molecular Sieve 5A and 13X are available in both stainless steel and glass column. For availability and ordering information on custom columns, please contact your representative direct sales/distributors.
Pg C-53
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