Methods for onboard monitoring of silver biocide during future human space exploration missions.,Analytical Methods

当前位置： X-MOL 学术 › Anal. Methods › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Methods for onboard monitoring of silver biocide during future human space exploration missions.
Analytical Methods ( IF 2.7 ) Pub Date : 2020-05-14 , DOI: 10.1039/d0ay00518e
Mauro Sergio Ferreira Santos ₁ , Aaron Craig Noell ₁ , Maria Fernanda Mora ₁

Affiliation

Silver ions (Ag⁺) have been proposed as a biocide to treat the water in NASA's next generation of human space exploration vehicles/habitats. One advantage of Ag⁺ is that it is effective as a biocide in a range (200 to 500 ppb) safe for human consumption. So, monitoring Ag⁺ is essential to ensure the safety and health of the crew. Here we present two analytical methods based on capillary electrophoresis and capacitively coupled contactless conductivity detection (CE-C⁴D) to address the need to monitor Ag⁺ levels in water. Using 5 M acetic acid as a background electrolyte (BGE), 100 ppb of Ag⁺ could be detected in a simulant of the International Space Station (ISS) water. In addition to Ag⁺, other inorganic cations (K⁺, Ca²⁺, Na⁺, Mg²⁺, Ni²⁺, and Zn²⁺) frequently found in the ISS potable water can be detected simultaneously using this BGE in less than 4.5 min. By using a BGE composed of 0.5 M acetic acid, levels of Ag⁺ as low as 25 ppb could be detected in the ISS water simulant in less than 2.5 min. Although in this condition none of the other cations interfered with the detection of Ag⁺, some of them co-migrated, which could prevent obtaining additional information about the sample composition.

中文翻译：

未来人类太空探索任务中机载银杀灭剂监测方法。

已提出银离子（Ag ⁺）作为杀菌剂，用于处理NASA下一代人类太空探索载具/栖息地中的水。Ag ^+的一个优点是，它在人类食用安全范围内（200到500 ppb）有效用作杀菌剂。因此，监测Ag ⁺对确保机组人员的安全和健康至关重要。在这里，我们介绍了两种基于毛细管电泳和电容耦合非接触电导率检测（CE-C ⁴ D）的分析方法，以满足监测水中Ag ⁺含量的需求。使用5 M乙酸作为背景电解质（BGE），100 ppb Ag ⁺可以在国际空间站（ISS）水的模拟物中检测到。除了Ag ^+之外，使用此BGE还可以同时检测出ISS饮用水中经常发现的其他无机阳离子（K ⁺，Ca 2 ⁺，Na ⁺，Mg 2 ⁺，Ni ²⁺和Zn ²⁺）。 4.5分钟通过使用由0.5 M乙酸组成的BGE，可以在不到2.5分钟的时间内在ISS水模拟物中检测到低至25 ppb的Ag ⁺含量。尽管在这种条件下，其他阳离子均不干扰Ag ⁺的检测，其中一些会共同迁移，这可能会阻止获取有关样本组成的其他信息。

更新日期：2020-07-02

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11