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使用光学传感器分析混凝土中的总和水溶性化物
Karl L Sterz1, Bernhard Müller1, Marlene Sakoparnig2
1Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, 8010, Graz, Austria.
Talanta
|April 16, 2025
概括
这项研究引入了一种用于测量混凝土中化物含量的新型光学传感器. 开发的传感器表现出高精度和稳定性,为评估混凝土质量和耐用性提供了可靠的方法.
科学领域:
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
- 土木工程 土木工程是指土木工程.
背景情况:
- 化物进入混凝土结构会导致腐蚀,损害耐用性.
- 精确的含量测量对于评估混凝土降解和预测使用寿命至关重要.
- 现有的化物分析方法可能耗时或需要专门的实验室设备.
研究的目的:
- 开发和验证一种光学传感器,用于在混凝土粉样中定量测定化物.
- 评估传感器的性能,包括其稳定性,pH独立性和对离子的选择性.
- 评估传感器适用于各种混凝土矩阵中的水溶性和总化物测量.
主要方法:
- 使用路奇金,光复合体,微粒和聚烯--烯胺矩阵制造一个光学传感器.
- 使用双生命周期引用 (DLR) 技术用于化物量化.
- 测试传感器在pH值范围1.0到7.0之间以及干扰离子 (硫酸盐,酸盐,乙酸盐) 存在的情况下的响应.
- 通过将其测量结果与各种混凝土样本上的电位计定位结果进行比较,验证传感器的有效性.
主要成果:
- 光学传感器在pH1.0和7.0之间没有显著的pH依赖.
- 传感器显示与硫酸盐离子的交叉交谈是最小的,尽管酸盐和酸盐略有降低了化物反应.
- 传感器在水和50%的酸中表现出稳定性,可测量水溶性和总化物.
- 在各种混凝土样本中对含量的光学测量 (0.02-0.38%w/w) 与电位计定位结果有很好的一致性.
结论:
- 开发的光学化物敏感膜是一种可靠和准确的工具,用于测量混凝土粉中的化物含量.
- 传感器的稳定性,pH不敏感性,以及在不同的混凝土类型中广泛的适用性表明它有可能在现场部署.
- 这种传感器为混凝土中的常规化物分析提供了有希望的替代方案,有助于加强结构健康监测和材料评估.
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