基于智能手机的低成本有效方法用于低范围化学氧气需求分析
Inalmar D Barbosa Segundo1, Jussara C Cardozo1, Pollyana Souza Castro2
1Renewable Energies and Environmental Sustainability Research Group, Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitário, Av. Salgado Filho 3000, Lagoa Nova, Natal, RN CEP 59078-970, Brazil.
MethodsX
|August 14, 2023
概括
研究人员现在可以用智能手机测量化学氧气需求 (COD). 这种简单,低成本的方法为水质监测提供了很高的准确性,特别是在发展中国家.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 水质监测 水质监测
背景情况:
- 传统的化学氧气需求 (COD) 分析通常依赖于昂贵的光谱仪,限制了资源有限的环境中的可访问性.
- 分散的环境监测对于有效的水资源管理和实现全球可持续发展目标至关重要.
研究的目的:
- 开发和验证使用智能手机技术进行COD分析的简单,快速和具有成本效益的协议.
- 为研究人员,特别是发展中国家的研究人员提供一种可行的替代传统光谱光度计方法.
主要方法:
- 开发了一种使用智能手机摄像头和免费Android应用程序分析HSV (色调,和,值) 颜色参数的协议.
- 校准使用理论酸甲酸盐值和消化的COD样本进行.
- 该方法的性能根据确定系数 (R2),准确性和范围进行了评估.
主要成果:
- 基于智能手机的COD分析实现了超过0.99的确定系数 (R2),这表明其可靠性很高.
- 该方法在0至150毫克L-1COD范围内的样品中显示了97%的平均准确性.
- 智能手机分析有效地取代了昂贵的光谱仪,显示了高可信度水平.
结论:
- 基于智能手机的COD测量为环境分析提供了一个有希望的,易于使用的工具,特别是在去中心化监测场景中.
- 这项新协议通过增强水质评估能力,支持可持续发展目标6 (清洁水和环境卫生).
- 该方法在读取HSV值方面的效率及其成本效益使其成为实验室和政策实施的宝贵资产.
相关概念视频
01:10Amperometry: Overview
Amperometry is a technique commonly used to measure the concentration of specific analytes in a solution by monitoring the electric current generated during an electrochemical reaction. It involves applying a constant potential between a working electrode and a reference electrode to measure the resulting current, which is proportional to the concentration of the analyte. The Clark oxygen electrode operates based on this principle of amperometry. It consists of a cathode and an anode enclosed...
01:19Gas Chromatography: Types of Detectors-II
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
01:29Oxygen Requirements and Growth Patterns
Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...