The presence of unidentified organofluorine compounds (UOF) has been investigated in recent publication, but their environmental occurrence is still poorly understood. Fluorine mass balance analysis was performed on environmental samples from lake Mjøsa and river Alna (surface water (n = 9), sediment (n = 5) and fish liver (n = 4)) and sewage samples from Oslo (n = 5), to reveal to the fraction of UOF. In samples that had extractable organofluorine (EOF) concentrations above the limit of detection (LoD), more than 70% of their EOF could not be accounted for by the 37 PFAS monitored in this study. The surface water samples from lake Mjøsa had EOF concentrations several times higher than what has been reported elsewhere in Nordic nations. The flux of EOF in river Alna and selected sewage pipes revealed that it was 1-2 orders of magnitude higher than the flux of the measured PFAS. The elevated concentrations of EOF in all samples pose a potential health and environmental hazard, as their composition remains mostly unknown.

最近的出版物已经研究了未鉴定的有机氟化合物 (UOF) 的存在，但对它们在环境中的发生情况仍知之甚少。对来自 Mjøsa 湖和 Alna 河（地表水 ( n  = 9)、沉积物 ( n  = 5) 和鱼肝 ( n  = 4)）的环境样品和来自奥斯陆 ( n ) 的污水样品进行了氟质量平衡分析。 = 5)，显示到 UOF 的分数。在可提取有机氟 (EOF) 浓度高于检测限 (LoD) 的样品中，本研究中监测的 37 种 PFAS 无法解释超过 70% 的 EOF。来自 Mjøsa 湖的地表水样本的 EOF 浓度比北欧国家其他地方报告的浓度高几倍。Alna 河和选定的污水管道中 EOF 的通量显示，它比实测 PFAS 的通量高 1-2 个数量级。所有样品中 EOF 浓度升高会对健康和环境造成潜在危害，因为它们的组成大部分仍然未知。