质量法测定植物营养液中电导率可行性  

Feasibility of Mass Method to Measure Electrical Conductivity Rate of Plant Nutrient Solution

作　　者：张华宇 周帆 廖晓斌[1] 刘新月 朱家铭 张嘉禾 ZHANG Huayu;ZHOU Fan;LIAO Xiaobin;LIU Xinyue;ZHU Jiaming;ZHANG Jiahe(College of Civil Engineering,Huaqiao University,Xiamen 361021,China)

机构地区：[1]华侨大学土木工程学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2024年第2期271-275,共5页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(51878301);青年科技创新资助项目(23YYST06QCB29)。

摘　　要：通过与测定电导率的传统电极法对比,探讨运用质量法测定植物营养液电导率的可行性。结果表明:采用质量法测定植物营养液中的电导率,测定值与采用高精度电导率/总溶解性固体水质测试笔测定结果极为接近,分别为19.85,19.30 mS·cm^(-1);溶液中的颗粒物仅贡献2.4%的电导率,悬浮物和胶体对电导率贡献更低(0.5%),络合态的有机物对电导率贡献也有限;解络后,植物营养液的电导率由19.30 mS·cm^(-1)急剧增至66.68 mS·cm^(-1)。By comparison with the traditional electrode method for measuring the electrical conductivity rate,the feasibility of mass method for measuring the electrical conductivity rate of the plant nutrient solution is discussed.The results show that the electrical conductivity rate in the plant nutrient solution measured by mass method is very close to the results measured by high precision electrical conductivity rate/total dissolved solid water quality test pen,19.85,19.30 mS·cm^(-1) respectively.The particles in the solution contribute only 2.4% the electrical conductivity rate,and suspended solids and colloids contribute less to it(0.5%).The contribution of complexed organic matter to the electrical conductivity rate is also limited.After decomplexation,the electrical conductivity rate of plant nutrient solution increases sharply from 19.30 mS·cm^(-1) to 66.68 mS·cm^(-1).

关 键 词：电导率 质量法 电极法 总溶解性固体 

分 类 号：X824[环境科学与工程—环境工程]