摘要
为了减小地下水中碘化物形态差异引发的监测误差,提升地下水中碘化物监测的精准性与时效性。研究了氧化还原电位和酸碱度对地下水中碘化物形态稳定的调控策略,通过添加体积分数为0.5%的氨水溶液作为保护剂,构建弱还原态-碱性体系协同稳定机制,能够有效抑制碘离子向其他形态转化,可将地下水中碘化物稳定保存的周期延长至5 d(相对标准偏差≤3.5%)。与电感耦合等离子体质谱(ICP-MS)检测技术相结合,在1.00~500.00μg/L范围内获得良好的线性相关性,相关系数=0.999 93,检出限为0.78μg/L。区别于传统的原状样品分析法,利用该方法的形态稳定机制,可精准地对地下水中碘化物的质量浓度进行测定分析,并拓宽ICP-MS法在环境监测领域的应用。
To reduce monitoring errors caused by variations in iodine species within groundwater and enhance the accuracy and timeliness of iodide monitoring,this study investigated strategies for stabilizing iodide speciation in groundwater through redox potential and pH adjustments.Ammonia solution[0.5%(V/V)]was added as a protective agent to establish a weakly reductive-alkaline environment to effectively inhibit the transformation of iodide into other species,extending the stabilization period of iodides in groundwater to 5 days(with a relative standard deviation,RSD≤3.5%).Combined with inductively coupled plasma mass spectrometry(ICP-MS)technology,excellent linear correlation(r=0.99993)was achieved within the range of 1.00~500.00μg/L,with a detection limit of 0.78μg/L.Unlike conventional direct analysis of raw samples,this method facilitates accurate quantification of groundwater iodide levels and extends the utilization of ICP-MS techniques within standardized environmental analytical frameworks.
作者
吴洋洋
徐敏
吴俊雄
龚怡冰
徐鹤峰
龚咤云
WU Yangyang;XU Min;WU Junxiong;GONG Yibing;XU Hefeng;GONG Zhayun(Jiangxi Province Key Laboratory of Exploration and Development of Critical Mineral Resources,Nanchang,Jiangxi 330009,China;Geological Environment Monitoring Institute of Jiangxi geological survey and Exploration Institute(Jiangxi Institute of Coal Geology for Exploration Research),Nanchang,Jiangxi 330009,China;The first geological brigade of Jiangxi Geological Bureau,Nanchang,Jiangxi 330009,China)
出处
《环境监控与预警》
2026年第1期60-65,共6页
Environmental Monitoring and Forewarning
基金
江西省地质调查勘查院科研项目(2024-7,2025-13),江西省地质调查勘查院地质环境监测所(江西省煤田地质勘察研究院)科研项目(2022SDDYDHS03)。
