Aqueous samples by GC [August 26, 2004]
Posted: Mon Aug 30, 2004 7:58 pm
By Stan Lee on Thursday, August 26, 2004 - 06:36 am:
I'm like to determine acetamide in a sample that is only water soluble and wondered if there is a GC column that would tolerate injection of an aqueous sample or if there was another way around this ?
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By Consumer Products Guy on Thursday, August 26, 2004 - 08:36 am:
Aqueous injections OK on most columns, keep injection volumes small (0.5ul) because water has high expansion cooefficient, will overflow inlets.
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By chromatographer1 on Thursday, August 26, 2004 - 10:02 am:
Porous polymer packed columns and PLOT columns should work fine with aqueous samples. Other phases (packed and capillary) will tolerate water well. Just try to minimize the time the water is on column AS A LIQUID.
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By sepp/carla on Friday, August 27, 2004 - 01:52 am:
we use low bleed columns and never had difficulties with aqueous samples.
I'm like to determine acetamide in a sample that is only water soluble and wondered if there is a GC column that would tolerate injection of an aqueous sample or if there was another way around this ?
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By Consumer Products Guy on Thursday, August 26, 2004 - 08:36 am:
Aqueous injections OK on most columns, keep injection volumes small (0.5ul) because water has high expansion cooefficient, will overflow inlets.
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By chromatographer1 on Thursday, August 26, 2004 - 10:02 am:
Porous polymer packed columns and PLOT columns should work fine with aqueous samples. Other phases (packed and capillary) will tolerate water well. Just try to minimize the time the water is on column AS A LIQUID.
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By sepp/carla on Friday, August 27, 2004 - 01:52 am:
we use low bleed columns and never had difficulties with aqueous samples.