water analysis Articles
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Water analysis
A complete tap water analysis includes the determination of the pH value, the alkalinity and the total water hardness. Both the pH measurement and the pH titration by means of a standard pH electrode suffer from several drawbacks. First, the response time of several minutes is too long and, above all, the stirring rate significantly influences the measured pH value. Unlike these standard pH ...
By Metrohm AG
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Comparing Oil in Water Analysis Methods
Wilks Enterprise has published a new White Paper that discusses various oil in water methods and their correlation with regulatory methods. While the amount of oil in water is highly regulated -- it can also be a challenging measurement. It is complicated by the fact that oil comes in many forms and the measurement is defined by the particular regulatory method. When EPA 1664 is the regulatory ...
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Why is alkalinity an important parameter in environmental water analysis?
Answer: Alkalinity is a measure of the acid-neutralizing or buffering capacity of a solution. The properties of water are is easily influenced by alkalinity, making it an important and widely used test. If any changes are made to a solution which could impact pH, alkalinity acts a buffer. This ability to neutralize acid (H+ ions) is what makes alkalinity so important. Hydroxides (OH-), carbonates ...
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Controlling Parameters in Water Analysis
The COD (Chemical Oxygen Demand) is one of most important parameters in water analysis. In Germany as in nearly all European countries tax for indirect discharges is based on the COD. Using the oxygen consumption is reasonable in the case of tax because the delay time of waste water in a treatment plant depends mainly on its biological activity. The oxygen consumption again is a degree of ...
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Drinking Water Analysis Guide
Public Water Systems (PWS), regulated by the United States Environmental Protection Agency (USEPA), provide drinking water to 90% of Americans. Water systems and laboratories testing drinking water for Safe Drinking Water Act (SDWA) compliance must be certified and must use USEPA approved methods, which are developed by the USEPA, other government agencies, universities, consensus method ...
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Techniques for Oil in Water Analysis
The people responsible for conducting oil in water measurements understand that the measurement can be quite challenging. Wastewater from different sources can contain many different types of hydrocarbons, each with different chemical make-ups. On top of the lack of chemical uniformity in different oils, there has been a large variety of methods developed to quantify the oil in the wastewater. ...
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Solvent-free oil-in-water analysis
Non-ionic surfactants can homogenize oily, produced water samples, creating optically clear microemulsions that are ideal for fluorescence measurements [1]. The use of surfactants to reduce fouling and improve the performance of on-line, fluorescence-based, oil-in-water monitors has been reported previously [2,3]. This paper describes the use of surfactants to prepare discrete water samples ...
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Piper Diagrams in Chemistry Water Analysis
Arthur M. Piper introduced the Piper diagram in 1994. It is used for studying water chemistry and quality. The Piper diagram helps in the segregation of analytical data necessary for determining the sources of the constituents dissolved in water. The applicability of the procedure is possible due to natural water having anions and cations in chemical equilibrium. The most abundant cations in ...
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The Jordan River basin: at the crossroads between conflict and cooperation
Several previous manuscripts have identified an opportunity to create a positivesum outcome for fresh water development and use by the five riparians of the Jordan River basin, in which all parties would receive enhanced resources concurrently, over time. This relies on the development of 'new water' coupled to the more efficient use of the existing water supplies. The application of the ...
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Application of Lab-on-a-chip Technology in Water Analysis
The Important of Water Analysis Water analysis is essential to ensure its quality or to detect pollutants that should be removed by water treatment. However, water quality does not mean making the water suitable for human consumption; it depends on its end use. For example, completely different quality standards are applied in case of industrial water compared to those applied to drinking ...
By Chemyx Inc
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Reagents and standards as per standard methods for the examination of water and wastewater 21st Edition 2005, APHA AWWA WEF
As one of the largest producers of Physical and Chemical Standards and Certified Reference Materials worldwide, Reagecon recognise that the growth in our range and the use of such standards requires an innovative approach to the presentation of our products. Focussing on water analysis, this catalogue details the standards, reagents and indicators for different test methods according to the ...
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International sailing centre - case study
Problem: The high week-end and low weekday use of this facility, plus seasonal variations in water usage, led to an increase in detected legionella counts. A solution was required that would be easy to control, simple to retro-fit and would operate equally effectively in periods of high and low usage. Solution: A Tarn-Pure system was installed on the central cold water storage tank that ...
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Transboundary water justice: a combined reading of literature on critical transboundary water interaction and ‘justice’, for analysis and diplomacy
By reviewing and blending two main bodies of research (critical transboundary water interaction analysis and centuries of thought on social justice) this paper seeks to improve international transboundary water interaction analysis and diplomacy. Various implications for transboundary analysis and diplomacy are grouped under themes of equitability, process/outcomes, and structural concerns. ...
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Coping with the daily challenges of routine water analysis
Analyzing different types of water samples on a regular basis presents several challenges for analysts. Depending on the type of lab (e.g., municipal or water bottling facilities), the number of samples to be analyzed can vary significantly. Every day such laboratories receive hundreds of samples that must go through pH, conductivity, and alkalinity testing, among others. If additional tests ...
By Metrohm AG
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A new systematic technique for retrofit of water network
This paper presents a new systematic technique for the retrofit of existing water network based on pinch analysis. This technique, which was applied on a paper mill, consists of three main steps: Network Diagnosis, Network Retrofit and Network Evolution. Network diagnosis step provides a good understanding of the existing water network through the use of a new tool called the Concentration Block ...
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Introduction to Puroxi
2023 will be a fantastic year. Think about it, and it will happen. I just wanted to start by acknowledging the poor people that have suffered from the earthquake this week. Our hearts, thoughts and prayers are with you all. This is one of our first blogs. My web girl has been pushing me to give her something. I want to start with an introduction of what we have done and how we do it. I am ...
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Comparative analysis of time-scaling properties about water pH in Poyang Lake Inlet and Outlet on the basis of fractal methods
Detrended fluctuation analysis (DFA) and multifractal methods are applied to the time-scaling properties analysis of water pH series in Poyang Lake Inlet and Outlet in China. The results show that these pH series are characterised by long-term memory and multifractal scaling, and these characteristics have obvious differences between the Lake Inlet and Outlet. The comparison results suggest that ...
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Decentralisation, HRD and production efficiency of water utilities: evidence from India
Decentralisation of water supplies in developing countries is being promoted by international aid agencies. It is argued that decentralisation by a government close to the people will generate better project performance. This article compares the performance of piped water supply schemes run by the state governments and local government in central India and finds that the latter are running less ...
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The need for specialized statistical software for ground-water analysis
Peer-reviewed guidance documents for the statistical analysis of ground-water monitoring data have been available for years, from the US EPA and from other bodies such as state Departments of Environmental Quality and ASTM. The truth, however, is that many of the statistical requirements are not being enforced by state regulators, with the result that statistics — where performed at all ...
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UN-Water Global Analysis and Assessment of Sanitation and Drinking Water 2014
The UN-Water Global Analysis and Assessment of Sanitation and Drinking Water report is produced by the World Health Organization (WHO) on behalf of UN-Water. It provides a global update on the policy frameworks, institutional arrangements, human resource base, and international and national finance streams in support of sanitation and drinking water. It is a substantive input into the activities ...
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