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相关概念视频

Testing Water Quality01:14

Testing Water Quality

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When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
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Determining the pH of Salt Solutions04:08

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The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution.  In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than...
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Author Spotlight: Advancing Coral Culture - Creating a Semi-Quantitatively Controlled Microenvironment System to Counter Current Limitations
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通过使用智能手机设备进行公民科学基础的海洋酸化观测.

Hangqian Li1, Shulu Zheng1, Qiao-Guo Tan1

  • 1State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen 361102, People's Republic of China.

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概括

一个新的基于智能手机的分析仪 (vSEA) 能够快速,准确地监测海洋酸性研究的海水pH值. 这种负担得起的工具符合全球标准,赋予公民科学环境监测的权力.

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科学领域:

  • 环境科学 环境科学
  • 分析化学 分析化学
  • 海洋学 海洋学 海洋学

背景情况:

  • 精确的海水pH值监测对于了解海洋酸化和环境变化至关重要.
  • 现有的方法可能是昂贵和复杂的,限制了广泛应用.
  • 需要可访问,精确和可在现场部署的pH测量工具.

研究的目的:

  • 开发和验证一款基于智能手机的多功能环境分析仪 (vSEA),用于快速测量海水pH值.
  • 评估vSEA算法的可行性和准确性,以在现场条件下量化pH值.
  • 为海洋酸化监测提供强大,负担得起和用户友好的解决方案.

主要方法:

  • 采用了基于智能手机的多功能环境分析仪 (vSEA) 与3D打印的防光外进行图像捕捉.
  • 探索和验证了用于海水样本定量pH值测量的vSEA算法.
  • 在沿海海水和珊瑚礁环境中进行了实地研究.
  • 通过使用t测试与最先进的基板光谱仪对比,验证了vSEA-pH系统的性能.

主要成果:

  • vSEA-pH系统实现了0.018pH单位的定量准确性,不确定性<0.01,达到全球海洋酸化观测网络 (GOA-ON) 的"天气"目标.
  • 测量结果与台式光谱仪一致 (t = 1.986,p = 0.7949).
  • 该系统在沿海海水和珊瑚系统的现场测量中成功应用.

结论:

  • vSEA-pH系统提供了一个简单,准确和适用的方法,用于现场测量海水pH值.
  • 它与各种智能手机设备的兼容性促进了广泛采用,包括公民科学倡议.
  • 该系统通过可访问的数据收集,显著帮助大规模的海洋酸化监测.