This study reports a functional passive sampler for monitoring gaseous elemental mercury (GEM). The material consists of gold nanoparticles (AuNP) deposited forming a film on thiol-modified glass slides. AuNP colloid was synthesized using sodium citrate, resulting in a size of 24.2 ?± 0.8 nm, as determined by transmission electron microscopy analysis. For the indoor test, AuNP films were placed into Petri plates. One part of the lot was kept exposed to the laboratory's atmosphere and the other part was stored in closed plate (control). The films were removed from both plates along a month and analyzed using a direct mercury analyzer. A linear relationship between Hg retention and exposure time was obtained until the 23 rd day, which allowed to calculate a GEM retention rate of 2.2 ng g -1 day -1 ; the maximum retention capacity was around 50 ng g -1 . This study provides an efficient method for indoor monitoring of GEM using AuNP films as passive sampler.
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机译：这项研究报告了一种用于监测气态元素汞（GEM）的功能性被动采样器。该材料由沉积的金纳米颗粒（AuNP）组成，在硫醇修饰的载玻片上形成薄膜。用柠檬酸钠合成AuNP胶体，通过透射电子显微镜分析确定其大小为24.2λ±0.8nm。对于室内测试，将AuNP薄膜放入培养皿中。批次的一部分一直暴露在实验室的大气中，另一部分则保存在封闭的平板中（对照）。沿一个月从两个板上取下薄膜，并使用直接水银分析仪进行分析。直到第23天为止，汞的保留与暴露时间之间存在线性关系，这可以计算出2.2 ng g -1 day -1的GEM保留率。最大保留容量约为50 ng g -1。这项研究提供了一种有效的方法，以AuNP薄膜作为被动采样器，用于室内监测GEM。
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