Abstract：
Water utilities encounter unpredictable odor issues that cannot be explained by routine water parameters during spring runoff, even in the summer and fall. Highly water-soluble organics (e.g., amino acids and saccharides) have been reported to form odorous disinfection byproducts during disinfection, but the lack of simple and practical on-site sampling techniques hampers their routine monitoring at trace levels in source water. Therefore, we have created two functionalized nested-in-sponge silica monoliths (NiS-SMs) using a one-pot synthesis method and demonstrated their application for extracting highly soluble organics in water. The NiS-SMs functionalized with the sulfonic group and phenylboronic moiety selectively extracted amino acids and monosaccharides, respectively. We further developed a spinning sampling technique using the composites and evaluated its robust performance under varying water conditions. The spinning sampling coupled to high-performance liquid chromatography tandem mass spectrometry analysis provided limits of detection for amino acids at 0.038-0.092 ng L-1 and monosaccharides at 0.036-0.14 ng L-1. Using the pre-equilibrium sampling-rate calibration, we demonstrated the applicability of the spinning sampling technique for on-site sampling and monitoring of amino acids and monosaccharides in river water. The new composite materials and rapid on-site sampling technique are unique and efficient tools for monitoring highly soluble organics in water sources.
摘要：
水务公司遇到不可预测的气味问题，无法通过春季径流期间的常规水参数来解释，即使在夏天和秋天。高水溶性有机物(例如，据报道，氨基酸和糖类）在消毒过程中会形成有气味的消毒副产物，但是缺乏简单实用的现场采样技术阻碍了对水源水中痕量水平的常规监测。因此,我们使用一锅法合成了两个功能化的海绵嵌套二氧化硅整料（NiS-SM），并证明了它们在提取水中高可溶性有机物中的应用。用磺酸基和苯基硼酸部分官能化的NiS-SM选择性提取的氨基酸和单糖，分别。我们进一步开发了一种使用复合材料的旋转采样技术，并评估了其在不同水条件下的坚固性能。旋转采样与高效液相色谱串联质谱分析相结合，提供了0.038-0.092ngL-1的氨基酸和0.036-0.14ngL-1的单糖的检出限。使用预平衡采样率校准，我们证明了旋转采样技术在现场采样和监测河水中氨基酸和单糖的适用性。新型复合材料和快速现场采样技术是监测水源中高可溶性有机物的独特而有效的工具。
