MSL - SAM and CHEMIN, Discussion of the science/results from these instruments |
MSL - SAM and CHEMIN, Discussion of the science/results from these instruments |
Nov 21 2012, 11:46 AM
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#1
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
ADMIN NOTE: Hi All, a new topic for the discussion of the science from the SAM and Chemin instruments.
There has been a very important amendment to Rule 1.3 which is explained here. Please remember Rule 1.3 at all times when discussing matters in this section. |
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Feb 1 2013, 09:29 PM
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#2
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Member Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338 |
The cited paper allows for the possibility that the organic material that contributed to the chlorinated hydrocarbons was contamination from Earth (as did an MSL press briefing).
If one assumes that the supply of any organic contamination from Earth is finite and limited, then repeating the measurement a number of times should provide some insight into this issue: If the quantity of chlorinated hydrocarbon decreases steadily, that would tend to indicate contamination. A residual quantity might indicate an indigenous source. |
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Feb 2 2013, 11:12 AM
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#3
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Junior Member Group: Members Posts: 93 Joined: 21-January 13 Member No.: 6845 |
The cited paper allows for the possibility that the organic material that contributed to the chlorinated hydrocarbons was contamination from Earth (as did an MSL press briefing). If one assumes that the supply of any organic contamination from Earth is finite and limited, then repeating the measurement a number of times should provide some insight into this issue: If the quantity of chlorinated hydrocarbon decreases steadily, that would tend to indicate contamination. A residual quantity might indicate an indigenous source. The derivatization reagent MTBSTFA leaks slowly and will not go away in the sealed enviroment of SAM. SAM is a box with nearly no openings. The article of Arno Buch is describing the reactions of the MTBSTFA and they are not aproblem in its own, as long as the perchlorate is not everywhere. The perchlorates will make it very difficult to determin where the organic carbon is coming from. The chlorinated methanes can come from nearly every source. |
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