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由于人们已认识到重金属对人体的危害,所以水中痕量重金属是水质监测的重要项目。为了有效地监测重金属,近年来人们一直在寻找更简便且有效的富集方法。从报道来看,螫合纤维素滤膜十分引人注目。1966年,Campbell研制成功强酸性和强碱性的离子交换滤膜,水样通过滤膜后,被测组分吸附在滤膜上,然后将膜直接放到X-射线荧光仪上测定。但是,Campbell研制的强酸性离子交换滤膜用于富集天然水样品中的痕量重金属时存在两个缺点:需要酸性pH且膜吸附碱和碱土金属。由于水样中的碱和碱土金属
As people have recognized the hazards of heavy metals on the human body, trace heavy metals in water is an important project of water quality monitoring. In order to effectively monitor heavy metals, people have been looking for simpler and more effective enrichment methods in recent years. From the report point of view, 螫 together cellulose filter is very attractive. In 1966, Campbell successfully developed a strong acidic and strong alkaline ion exchange membrane, the water sample through the filter, the measured components adsorbed on the filter, and then the film was placed directly on the X-ray fluorescence determination. However, Campbell developed a strongly acidic ion exchange membrane for the enrichment of trace amounts of heavy metals in natural water samples. There are two drawbacks: Acidic pH is required and membranes adsorb alkali and alkaline earth metals. Due to the alkali and alkaline earth metals in the water sample