在自然水域测量210 Po:比较了三种方法,结果相似
James T Waples1, Gage J Hunter1, Rachel A Smith1
1School of Freshwater Sciences, University of Wisconsin-Milwaukee, 600 East Greenfield Avenue, Milwaukee, WI, 53204, USA.
Journal of environmental radioactivity
|June 17, 2025
概括
这项研究发现,在淡水中的铁和基方法之间,-210回收的差异很小. 结果表明,这些方法在量化微粒有机物流量方面是可比的.
科学领域:
- 环境化学环境化学
- 放射化学 放射化学是指辐射化学.
- 海洋学 海洋学 海洋学
背景情况:
- -210 (Po) 和-210 (Pb) 不平衡被用来测量微粒有机物流量.
- 之前的研究表明Fe (OH) 和Co-APDC共同降水方法之间的Po回收有差异.
研究的目的:
- 为了比较使用Fe(OH) 3和Co-APDC共同降水方法在淡水中的回收.
- 为了调查Po测量的潜在干扰.
主要方法:
- 应用了罗卡-马蒂等人提出的两种方法. (2021) 和一个修改的Fe(OH) 3技术.
- 在湖泊,港口,河流和沼泽水样本中测量了210的Po活动.
- 评估了平衡时间和潜在的有机复合效应.
主要成果:
- 在所有三种Po恢复方法之间发现了一个非显著的偏差 (≤0.5 dpm 100 L-1).
- 没有证据表明15分钟内不完全209Po平衡.
- 没有迹象表明溶解的PO有机复合物干扰恢复.
结论:
- Fe (OH) 3和Co-APDC方法显示在淡水中可比的Po回收.
- 这些发现并不与海洋系统的结果相矛盾;210Po的行为在水类之间可能有所不同.
- 建议进一步调查铁沉积物收集和有机物对Po回收的影响.
相关概念视频
Gravimetry: Overview
Gravimetric analysis is a quantitative method where the analyte is isolated and weighed directly or after conversion into a substance of known composition. Gravimetric analysis can be classified as precipitation, electrogravimetry, volatilization, and particulate gravimetry, based on the method used to isolate the analyte.
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
Sampling Methods: Sample Types
Sampling materials are classified into three main types: solid, liquid, and gas.
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...


