| 基于快速消解的海洋沉积物重金属ICP-MS测定条件优化 |
| Optimization of Conditions for the Determination of Heavy Metals in Marine Sediments by ICP-MS Based on Rapid Digestion |
| 投稿时间：2022-12-06 修订日期：2023-04-21 |
| DOI：10.19316/j.issn.1002-6002.2024.03.02 |
| 中文关键词: 海洋沉积物 重金属 电感耦合等离子体质谱法 快速消解 |
| 英文关键词:marine sediments heavy metals inductively coupled plasma mass spectrometry rapid digestion |
| 基金项目:广州市基础研究计划基础与应用基础研究项目(2023A04J0257) |
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| 通讯作者:刘秋辛* 生态环境部珠江流域南海海域生态环境监督管理局生态环境监测与科学研究中心, 广东 广州 510610 |
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| 中文摘要: |
| 准确测定海洋沉积物中重金属元素的含量,是开展海洋生态环境评价与管理的基础。比较研究了当前生态环境监测领域几种主要的检测标准方法和近年热门的土壤快速消解法对海洋沉积物中重金属的检测效果。通过研究不同消解体系、消解压力、校准溶液配制方法以及内标元素、内标浓度等条件对海洋沉积物重金属测定效果的影响,优化了海洋沉积物样品的快速消解过程和测定条件。结果表明:优化后的快速消解方法针对Cr、Ni、Cu、Zn、Cd和Pb的方法检出限为0.004~0.8 mg/kg,测定下限为0.016~3.2 mg/kg,回收率为95.4%~109.2%,相对标准偏差为0%~3.22%,方法准确可靠、快速高效,满足海洋沉积物样品(尤其是大批量样品)的重金属测试需求。 |
| 英文摘要: |
| Accurate determination of heavy metals in marine sediments is of great significance for assessment and management of marine ecological environment. In this paper, the effects of several main detection standard methods in the field of ecological environment monitoring and the recent popular soil rapid digestion method on the detection of heavy metals in marine sediments were compared and studied. By testing the effects of different acid digestion systems and digestion pressures, as well as the preparation of calibration solution and the selection of internal standard elements and concentration on the digestion effect of sediment samples,the optimal conditions of the rapid digestion process were obtained. The results showed that the detection limits of Cr,Ni,Cu,Zn,Cd and Pb were 0.004-0.8 mg/kg,and the lower limits were 0. 016-3.2 mg/kg. The recoveries ranged from 95.4% to 109.2%, and the relative standard deviations were 0%-3.22%. Altogether, the improved method for heavy metals determination in marine sediments is reliable,efficient and accurate. |
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