title: Temporal and spatial distribution of semicarbazide in western Laizhou Bay.
abstract: Semicarbazide (SEM), an industrial raw material and the marker residue of nitrofurazone as a veterinary drug, has become a new type of marine pollutant. A standard method (ultra-performance liquid chromatography-tandem mass spectrometry, UPLC-MS/MS) was used to analyze SEM in seawater, sediment, and shellfish. A series of sections and stations were set up in radical distribution in western Laizhou Bay, with six voyages and 150 monitoring samples. The concentrations of SEM in seawater and shellfish were 10-11and 10-10kg/L, respectively, and no SEM was detected in the sediment. Distribution characteristics at each state, temporal and spatial trends, multivariate analyses, and the causes were analyzed to assess the pollution level, which aimed to offer a database for drafting the national baseline values of SEM in seawater and sediment in future. The data obtained could be used for integrated watershed management of marine environment and economic activities for constructing a blue economic zone of Shandong Peninsula in China.
authors.affiliation: Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Shandong Marine Resource and Environment Research Institute, Yantai 264006, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: article0535@163.com.
authors.forename: Xiuhui
authors.initials: X
authors.lastname: Tian
authors.affiliation: Shandong Marine Resource and Environment Research Institute, Yantai 264006, China.
authors.forename: Yingjiang
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Shandong Marine Resource and Environment Research Institute, Yantai 264006, China.
authors.forename: Xiukai
authors.initials: X
authors.lastname: Song
authors.affiliation: Shandong Marine Resource and Environment Research Institute, Yantai 264006, China.
authors.forename: Xianghong
authors.initials: X
authors.lastname: Gong
authors.affiliation: Shandong Marine Resource and Environment Research Institute, Yantai 264006, China.
authors.forename: Yihao
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Shandong Marine Resource and Environment Research Institute, Yantai 264006, China.
authors.forename: Quanli
authors.initials: Q
authors.lastname: Zhou
authors.affiliation: Shandong Marine Resource and Environment Research Institute, Yantai 264006, China.
authors.forename: Zhongquan
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Ludong University, Yantai 264025, China.
authors.forename: Chuanhai
authors.initials: C
authors.lastname: Xia
mesh_terms: D061006:Bays / Q000737:chemistry*; D002681:China; D004396:Coloring Agents; D004784:Environmental Monitoring / Q000379:methods*; D005843:Geography; D019015:Geologic Sediments / Q000737:chemistry*; D015203:Reproducibility of Results; D012623:Seawater / Q000737:chemistry*; D012663:Semicarbazides / Q000032:analysis*; D012758:Shellfish / Q000032:analysis; D053719:Tandem Mass Spectrometry; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D004396:Coloring Agents; D012663:Semicarbazides; D014874:Water Pollutants, Chemical; C010059:carbamylhydrazine
keywords: Distribution; Laizhou Bay; Semicarbazide; UPLC–MS/MS