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相关概念视频

Precipitation Titration: Endpoint Detection Methods01:19

Precipitation Titration: Endpoint Detection Methods

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In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3.
In the Volhard method, a standard excess of AgNO3 is first added to the...
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Gravimetry: Overview01:05

Gravimetry: Overview

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Gravimetric analysis is a quantitative method where the analyte is isolated and weighed directly or after conversion into a substance of known composition. Gravimetric analysis can be classified as precipitation, electrogravimetry, volatilization, and particulate gravimetry, based on the method used to isolate the analyte.
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
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相关实验视频

Updated: Jan 17, 2026

Manufacturing Simple and Inexpensive Soil Surface Temperature and Gravimetric Water Content Sensors
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用低成本传感器与微控制器软件配对设计屋顶雨水质量传感记录分级系统的方法.

Santosh R Ghimire1, Kurt Wolfe1, John M Johnston1

  • 1U.S. Environmental Protection Agency, Office of Research and Development, Athens, Georgia 30605, United States.

ACS ES&T water
|September 15, 2025
PubMed
概括

一个新的系统使用低成本的传感器和智能应用程序监测屋顶雨水收集 (RWH) 的质量. 这个经过验证的系统有效地跟踪导电率,温度和深度,确保可靠的水质数据.

关键词:
导电性的导电性.雨水质量 雨水质量雨水传感器是一个雨水传感器.屋顶雨水收集 雨水收集温度的温度的温度的温度的温度.

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Manufacturing Simple and Inexpensive Soil Surface Temperature and Gravimetric Water Content Sensors
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科学领域:

  • 环境科学 环境科学
  • 传感器技术 传感器技术
  • 水资源管理 水资源管理

背景情况:

  • 雨水收集 (RWH) 系统对于可持续的水资源管理越来越重要.
  • 监测RWH质量对于确保水安全和可用性至关重要.
  • 现有的监控系统可能昂贵而复杂.

研究的目的:

  • 开发和验证一个具有成本效益的传感记录分级 (SRG) 系统,用于屋顶RWH质量.
  • 监测关键的RWH参数,包括电导率,温度和深度.
  • 为RWH系统中的数据收集和分析提供一个强大的方法.

主要方法:

  • 设计了一种原型SRG系统,配备了低成本的传感器,太阳能数据记录器和Arduino IDE软件.
  • 部署了系统来监控一个接收屋顶排水的雨桶,持续了七个月.
  • 建立了使用替代传感器集的数据验证协议,并对数据中存在的空白进行了数据清理.

主要成果:

  • 与验证传感器相比,SRG系统表现出强大的性能和高相关性 (导电率:0.99,温度:1.00).
  • 监测到的RWH导电率在7~116μS/cm,温度在5~29°C,深度在29~838mm之间.
  • 最小的数据缺口被成功管理,归因于天气或硬件/软件问题.

结论:

  • 开发的SRG系统为监测屋顶RWH质量提供了可靠且具有成本效益的解决方案.
  • 经过验证的传感器性能确保了环境和水资源管理应用的准确数据收集.
  • 该方法支持对RWH系统实施和维护的知情决策.