自主<斜体>原位斜体>传感器需要用于大规模监测海洋环境中的高频营养波动。我们提出了一种潜水式双化学传感器,可同时对流体样品进行多参数<斜体>原位斜体>分析的多项比色测定。该传感器基于一个高度可配置的架构,该架构已经成功部署了几个月,它使用10个电磁阀、4个注射器、3个步进电机、2个led、4个光电二极管和“镶嵌”微流体,可以光学测量微升流体体积。流体通道被加工成由聚甲基丙烯酸甲酯(PMMA)制成的模块化两层微流控片上实验室(LOC),其中两个平行镶嵌的光学单元路径长度分别为10.4 mm和25.4 mm(分别为1.7 μl和4 μl)。不同的LOC设计可用于实现各种比色测定。我们演示了我们的双化学传感器的应用,用于同时测量硝酸盐和溶解的正磷酸盐:初级生产的两种基本营养物质。双种硝酸盐和磷酸盐“NP传感器”的性能首次在受控的实验室环境中被表征。综合营养标准中含有的含微量元素,浓度范围为2.5µM - 100µM <内联公式id="inf1">N3−内联公式>和0.25µM - 10µM <内联公式id="inf2">PO4 3 were analyzed,报告发现97海里的极限< inline-formula id =“inf3”> < mml:数学id =“m3”xmlns: mml = " http://www.w3.org/1998/Math/MathML " > < mml: mrow > < mml: msubsup > < mml: mrow > < mml: mi mathvariant =“正常”> N < / mml: mi > < mml: mi mathvariant =“正常”> O < / mml: mi > < / mml: mrow > < mml: mn > 3 < / mml: mn > < mml:莫>−< / mml:莫> < / mml: msubsup > < / mml: mrow > < / mml:数学> < / inline-formula > 15 nM < inline-formula id =“inf4”> < mml:数学id =“m4 xmlns: mml = " http://www.w3.org/1998/Math/MathML " > < mml: mrow > < mml: msubsup > < mml: mrow > < mml: mi mathvariant="normal">PO43−. Calibrations were repeated under 3 fixed temperature conditions, T = 5°C, 10°C, 15°C, to determine the temperature-dependent sensitivity relations for both species needed to calculate concentrations during field deployments. Finally, an 8-day field deployment in Fish Hatchery Park, NS, Canada followed, acquiring a total of 592 nitrate and dissolved orthophosphate measurements. An on-board combined nutrient standard was measured periodically to assess the in situ accuracy of the sensor, with an average relative uncertainty of 15% across the deployment. Measured nitrate and dissolved orthophosphate levels in the river reached as high as 10 µM and 3.6 µM, respectively. Fast Fourier transform analysis suggests a strong out-of-phase relationship between measured phosphate and water level, with a shared frequency peak in both data agreeing within a 3.2% difference. This trend is due to conventional mixing at the river mouth to neighboring Bedford Basin. A spike in the measured nitrate to phosphate (N:P) ratio was also observed, synchronized to a precipitation event and indicative of runoff. The novel sensor will enable high-frequency dual-nutrient monitoring in many aquatic environments.