The three members of Sledge Team 1 in the Denmark Expedition of 1906–08 died in the fall of 1907 trying to return to the basecamp in Danmarkshavn in north-east Greenland. In their final approach they attempted to make it across 79-Fjord towards a depot on Lambert's Land on their dog sledges, but were impaired in doing so by rough ice scape, exhaustion and hunger. The last to die was Jørgen Brønlund. His body was found four months later, along with his diary, which on the last page gave a short explanation of what happened. Below his signature was adhered a foreign black spot. The spot has been analysed by inductively coupled plasma mass spectrometry, X-ray fluorescence, synchrotron radiation powder X-ray diffraction, Raman spectroscopy and pyrolysis gas chromatography mass spectrometry, which cast a light on the last hours of Brønlund's life. The analyses confirmed the presence of key minerals used in the production of natural rubber. Furthermore, traces of fat and petroleum derivatives combined with the sample morphology suggest that the spot originated from a rubber gasket, accidentally charred on Brønlund's attempt to preheat his Lux kerosene stove with different flammable materials in want of methylated spirits.

中文翻译：

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在最黑暗的时刻：极地探险家 Jørgen Brønlund（卒于 1907 年）日记最后一页上的黑点分析

1906-08 年丹麦远征队中的雪橇队 1 的三名成员于 1907 年秋季在试图返回格陵兰岛东北部丹麦港的大本营时丧生。在他们的最后一次进场中，他们试图乘坐狗拉雪橇穿越 79-Fjord 前往兰伯特土地上的一个仓库，但由于崎岖的冰景、精疲力竭和饥饿而受到影响。最后死去的是约尔根·布伦德。四个月后，人们发现了他的尸体以及他的日记，日记的最后一页简要解释了所发生的事情。在他的签名下面贴着一个外国黑点。通过电感耦合等离子体质谱法、X 射线荧光法、同步辐射粉末 X 射线衍射法、拉曼光谱法和热解气相色谱法质谱法对该斑点进行了分析，这对 Brønlund' 的最后几个小时进行了分析。的生活。分析证实了天然橡胶生产中使用的关键矿物质的存在。此外，脂肪和石油衍生物的痕迹与样品形态相结合表明，该斑点起源于橡胶垫圈，在 Brønlund 试图用不同的易燃材料预热他的 Lux 煤油炉时意外烧焦，需要甲基化酒精。