PURINES AND TRIAZINES IN MURCHISON METEORITE
PURINES AND TRIAZINES IN MURCHISON METEORITE
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DOI：
10.1016/0016-7037(75)90101-5
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发表时间：
1975-01-01
影响因子：
5
通讯作者：
ANDERS, E
中科院分区：
文献类型：
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作者：
HAYATSU, R;STUDIER, MH;ANDERS, E
对Murchison C2球粒陨石的两个样品进行了有机氮化合物的检测，使用了质谱仪以及纸层析和薄层层析。在温和的萃取条件下(水或甲酸)，只看到脂肪胺和C2-C6烷基吡啶，后者可能是污染物。在苛刻的萃取条件下(热，3-6M HCl或CF3COOH)，出现了多种碱性氮化合物，其含量(Ppm)如下：腺嘌呤(15)、鸟嘌呤(5)、三聚氰胺(20)、三聚氰酸(20-30)、鸟脲(30-45)、尿素(25)等。显然，这些化合物主要存在于大分子物质中，只有在酸解时才会释放出来。这些发现支持了我们早期在Orgueil陨石中对这些化合物的鉴定。他们还提出，福尔索姆等人最近的失败(Nature232,108-109,1971；Geochim)。宇宙学报37,455-465,1973)在碳质球粒陨石中发现嘌呤或三嗪是由于提取条件不充分：水和甲酸，而不是盐酸。相反，我们无法检测到Folome等人报告的主要化合物类别：4-羟基嘧啶。
Two samples of the Murchison C2 chondrite were examined for organic nitrogen compounds, using mass spectrometry as well as paper and thin-layer chromatography. Under mild extraction conditions (water or formic acid) only aliphatic amines and C2-C6alkylpyridines were seen; the latter may be contaminants. Under drastic extraction conditions (hot, 3–6 M HCl or CF3COOH), a variety of basic nitrogen compounds appeared, in the following amounts (ppm): adenine (15), guanine (5), melamine (20), cyanuric acid (20–30), guanylurea (30–45), urea (25), etc. Apparently these compounds are present mainly in macromolecular material, and are released only upon acid hydrolysis.These findings support our earlier identifications of these compounds in the Orgueil meteorite. They also suggest that the recent failure byFolsomeet al.(Nature232, 108–109, 1971;Geochim. Cosmochim.Acta37, 455–465, 1973) to find purines or triazines in carbonaceous chondrites was due to inadequate extraction conditions: water and formic acid, rather than HCl. Conversely, we were unable to detect the principal compound class reported by Folsomeet al.: 4-hydroxypyrimidines.