Micro-organic herbicides data from rivers [LOIS]

Micro-organic herbicide levels in river water for various sites within the Humber and Tweed catchments collected as part of the Land Ocean Interaction Study project (LOIS). The dataset contains data for Phenyl urea and Phenoxy acid herbicides, measured as 2,4-Dichlorophenoxyacetic acid, 4-(4-Chloro-O-tolyloxy) butyric acid, 4-Chloro-O-tolyloxyacetic acid, Chlorotoluron dissolved, Diuron dissolved, Isoproturon dissolved, Linuron dissolved, Mecoprop dissolved. Phenyl urea herbicide data is available for twelve sites in the Humber catchment within 1994 to 1995 and 1994 to 1997 and for three sites on the Tweed catchment within 1995. Phenoxy acid herbicide data is available for six sites (S1, U3, N4, W5 and O6) over the period December 1994 to September 1995, for 7 sites (S2, D7, A8, C9, D10, T11 and O12) over the period December 1994 to February 1997 and 3 sites (TW13, TW14 and TW15) over the period January 1995 to September 1995. Attempts were made to sample the sites at weekly intervals. However sampling was halted for short periods when it was not possible to process the samples quickly. Linuron dissolved was only measured from April 1994 - October 1994. Samples were collected in chromic acid-washed 1 litre glass bottles. Herbicide levels were concentrated before being measured using High Performance Liquid Chromatography for Phenyl urea herbicides and Gas Chromatography for Phenoxy acid herbicides. Until November 1994, analysis was completed by the York University and the Institute for Freshwater Ecology, Wareham, laboratories. From December 1994 onwards the samples were dispatched to the Institute for Hydrology, Wallingford, for extraction and analyses. Full details about this dataset can be found at https://doi.org/10.5285/e28ffc01-880d-423f-acb6-879b9fd4603a本数据集为陆地-海洋相互作用研究项目（Land Ocean Interaction Study, LOIS）所采集的亨伯（Humber）与特威德（Tweed）流域内各监测点位河水中的微量有机除草剂含量数据。数据集涵盖苯脲类（Phenyl urea）与苯氧羧酸类（Phenoxy acid）除草剂的检测数据，具体检测组分包括：2,4-二氯苯氧乙酸、4-(4-氯邻甲苯氧基)丁酸、4-氯邻甲苯氧基乙酸、溶解态绿麦隆（Chlorotoluron dissolved）、溶解态敌草隆（Diuron dissolved）、溶解态异丙隆（Isoproturon dissolved）、溶解态利谷隆（Linuron dissolved）以及溶解态麦草畏（Mecoprop dissolved）。苯脲类除草剂的检测数据覆盖两类时空范围：1994年至1995年、1994年至1997年的亨伯流域12个监测点位，以及1995年的特威德流域3个监测点位。苯氧羧酸类除草剂的检测数据覆盖情况如下：1994年12月至1995年9月期间的6个监测点位（S1、U3、N4、W5、O6）；1994年12月至1997年2月期间的7个监测点位（S2、D7、A8、C9、D10、T11、O12）；以及1995年1月至1995年9月期间的3个监测点位（TW13、TW14、TW15）。研究团队尝试以周为间隔对各监测点位开展采样，但因无法快速完成样品前处理，曾短暂暂停采样工作。其中，溶解态利谷隆仅在1994年4月至1994年10月期间进行了检测。样品采集于经铬酸清洗处理的1升玻璃试剂瓶中。除草剂含量在检测前需先进行富集：苯脲类除草剂采用高效液相色谱（High Performance Liquid Chromatography, HPLC）进行检测，苯氧羧酸类除草剂则采用气相色谱（Gas Chromatography, GC）进行检测。1994年11月之前，样品分析工作由约克大学（York University）与沃勒姆淡水生态研究所（Institute for Freshwater Ecology, Wareham）两家实验室完成；自1994年12月起，所有样品被送往沃林福德水文学研究所（Institute for Hydrology, Wallingford）进行萃取与分析。该数据集的完整详细信息可通过以下链接获取：https://doi.org/10.5285/e28ffc01-880d-423f-acb6-879b9fd4603a