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Capillary columns are open tubular columns constructed from which of the following materials?

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Capillary columns are open tubular columns constructed from which of the following materials?

(a) Glass

(b) Metal

(c) Stainless steel

(d) Fused silica

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Question is taken from Gas Chromatography topic in division Chromatography of Analytical Instrumentation

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Correct option is (d) Fused silica

The best I can explain: Capillary columns are constructed using fused silica. It is a very high purity glass.

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