کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1782773 | 1022357 | 2006 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A new extraction technique for in situ analyses of amino and carboxylic acids on Mars by gas chromatography mass spectrometry A new extraction technique for in situ analyses of amino and carboxylic acids on Mars by gas chromatography mass spectrometry](/preview/png/1782773.png)
In order to target key organic compounds in the Martian regolith using gas chromatography mass spectrometry (GC-MS), we have developed a new extraction procedure coupled with chemical derivatization. This new technique was tested on a Mars analog soil sample collected from the Atacama Desert in Chile. We found that amino and carboxylic acids can be extracted from the Atacama soil in a 1:1 mixture of isopropanol and water after ultrasonic treatment for 30 min. The extracted organic compounds were then derivatized in a single-step reaction using N-methyl-N-(tert-butyldimethylsilyl)-trifluoroacetamide (MTBSTFA) as the silylating agent in order to transform these compounds into volatile species that can then be detected by GC-MS. We are currently developing a miniaturized reaction cell suited for spaceflight, where both organic extraction and chemical derivatization processes can take place in a single step.
Journal: Planetary and Space Science - Volume 54, Issue 15, December 2006, Pages 1592–1599