Showing results for: ion-selective electrode Articles
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Water Ion Sensor-Water Ion Monitoring
About- Water Ion Sensor Ion sensor is a sensor that uses ion selective electrode to convert the amount of ions felt into usable output signal. Ion sensor is a selective measurement of the concentration (activity) of specific ions in solution. It has been 20 years since its development and plays an extremely important role in all scientific fields. In recent years, due to the development of ...
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A voltammetric method for determining free metal activities in aqueous solutions. Part 1: direct current voltammetry of Cd, Cu, and Pb
A selective and sensitive method for determining free metal activities (M2+) for Cd, Cu and Pb in aqueous solutions is presented based on the Lingane and DeFord and Hume models. Electrochemical and complexation studies were carried out by direct current voltammetry (DCV) and by metal ion selective electrodes (ISE) as a reference method. A voltammetric equation was tested to evaluate (M2+) by ...
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Ion-selective electrodes: Standard addition and direct measurement - Part 2
The second part of this blog series focuses on the different ways of carrying out a potentiometric ion measurement with an ion-selective electrode (ISE). The two most common ways are standard addition and direct measurement. In the past, you may have doubted which of these two determination methods was most suitable for a sample. To make it easier for you to answer this question, I will ...
By Metrohm AG
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Titrimetric determination of sulfate
Most methods for the titrimetric determination of sulfate do not work reliably if interfering divalent cations such as calcium and magne¬sium are present in the sample. Using the methods described below calcium and magnesium will not interfere and can even be deter¬mined in the same analysis. IntroductionSeveral different titration methods are used to determine sulfate content: Titration ...
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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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Automated Colorimetric Method for Nitrate Analysis
Several methods exist for determining nitrate in aqueous solutions. However, the most commonly performed USEPA-approved methods are problematic and can be unreliable. USEPA methods 353.1 nitrate Hydrazine Reduction1,2 and 353.2 nitrate Cadmium Reduction3 utilize chemicals that are carcinogenic and highly toxic. Hazardous waste is generated when performing these methods and disposal is costly. ...
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The best water quality sensor
JXCT provides different kinds of water quality meter, portable water quality detector, multi-parameter water quality analyzer, laboratory water quality detector, water quality sensor, can monitor PH, conductivity, dissolved oxygen, turbidity, residual chlorine, ammonia nitrogen, blue green algae, chlorophyll and other parameters, can be used in aquaculture water, sewage, rivers, lakes, river ...
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A polyvinylchloride-based cadmium ion-selective electrode using [Mo2(OAc)2(H2-calix[4]arene)] as an electroactive material
A highly electroactive material Mo2[(OAc)2(H2-calix[4]arene)] is used as a neutral carrier for Cd2 + ions in this paper. The membrane is fabricated by using ionophore [Mo2(OAc)2(H2-calix[4]arene)]:poly(vinyl chloride) (PVC): dibutylphthalate(DBP):sodium tetraphenyl borate (NaTPB) in the ratio of 40:300:470:5 respectively and tetrahydrofuran (THF) used as a solvent. The membrane electrode ...
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Potential of in-situ sensors with ion-selective electrodes for aeration control at wastewater treatment plants
Abstract: A pilot-scale activated sludge wastewater treatment plant (WWTP) operated with nitrification and pre-denitrification was monitored with a set of on-line sensors for over 3 years. Wet-chemistry ex-situ analyzers, UV and UV-Visible in-situ sensors and in-situ sensors based on ion-selective electrodes (ISE) were used. New ISE sensors for ammonium, nitrate and nitrite, adapted to water and ...
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Potential of in-situ sensors with ion-selective electrodes for aeration control at wastewater treatment plants
Abstract: A pilot-scale activated sludge wastewater treatment plant (WWTP) operated with nitrification and pre-denitrification was monitored with a set of on-line sensors for over 3 years. Wet-chemistry ex-situ analyzers, UV and UV-Visible in-situ sensors and in-situ sensors based on ion-selective electrodes (ISE) were used. New ISE sensors for ammonium, nitrate and nitrite, adapted to water and ...
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Testing for Nitrates in Water, what are the Options?
Nitrate is a naturally occurring substance in the environment and is commonly found in most water sources, it is usually only a cause for concern in areas where water supplies can be affected by farm runs offs and agriculture, its use as a fertiliser can cause increased levels in water supplies The UK safe limit for nitrates in Drinking water is 50mg/l as described in the current advice on ...
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Water Quality Sensors
Background Water is the source of life, human life and production activities can not do without water. The quality of drinking water is closely related to human health. Water quality monitoring and control has become an important subject of modern science. The on-line water quality monitoring system can accurately, timely and comprehensively reflect the current water quality and development ...
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Verifying the Use of Specific Conductance as a Surrogate for Chloride in Seawater Matrices
ABSTRACT Coastal groundwater supplies, when overused, are particularly vulnerable to chloride contamination due to their close proximity to saltwater. Bevated chloride concentration in groundwater isthe most commonly used indicator of saltwater intrusion in coastal aquifers. Father well-defined relationships of specific conductance (SC) to chloride exist (Hem 1992: Christensen et al. 1999). To ...
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Analysis of Anionic Contamination & General Quality Testing in Water from Sewage Treatment Plants and Industrial Discharge & Effluents by Colorimetry
Problem The high concentration of Industry, Agriculture and People in and around the United States has changed the “nature” of our environment. There are Toxic Metals coming from various metallurgical processes; Plating, Foundry, Smelting, Milling, etc., which are readily determined by Atomic Absorption Spectroscopy (AAS). Volatile Organics from the many Petrochemical-based operations are ...
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Top 6 water quality sensors
What is a water quality sensor? Water quality sensors measure water parameters such as conductivity, dissolved oxygen, pH, COD, residual chlorine, turbidity and so on through a variety of methods such as chemical, physical and biological reactions of water, providing data support for researchers, observers and engineers. It is used in laboratory research, environmental management improvement, ...
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3 Important Factors for Choosing a pH Data Logger
Common Issues and Recommended Solutions with a pH Data Logger pH Measurement is very common in industrial processes, plating, wastewater treatment and environmental monitoring. Using a pH data logger to record pH provides information on long-term trends and the impact of various factors along with providing information for quality control, compliance reporting and alarming. However, to capture ...
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New Nitrate monitor lowers costs
Responding to global demand for improved monitoring of nitrate in freshwater, OTT HydroMet has launched a new optical nitrate sensor, the OTT ecoN. “This is fantastic news for scientists, catchment managers, water companies, regulators and environmental consultants,” says Ronan O'Maitiu, Global Product Manager for the OTT ecoN. “In the past, customers have been caught between ...
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Indoor-outdoor relationship of suspended particulate matter and its chemical composition at different sizes
The indoor-outdoor concentration relationship of particulate matter PM9.0 (aerodynamic diameter 9 µm or smaller) and its chemical composition (sulfate, nitrate, chloride and ammonium) has been studied. Samples were collected using four identical Anderson impactors, each one collecting nine size ranges by eight impactor stages (9, 5.8, 4.7, 3.3, 2.1, 1.1, 0.65 and 0.43 µm) plus a back-up filter ...
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History of Metrohm IC - Part 6
Even though combustion ion chromatography (CIC) is regarded as an up-and-coming sample preparation and analysis technique, the basic process behind CIC has already existed for many years. This blog post introduces the history of this technique, the working principle, and some applications for CIC.\r\n"}}">Even though combustion ion chromatography (CIC) is regarded as an up-and-coming sample ...
By Metrohm AG
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Hydrogen Chloride Analyzer: Your Solution for Precise HCL Measurement!
Are you ready for a deep dive into Hydrogen Chloride Analyzers? These devices measure Hydrogen Chloride in the air. You’ll learn all about them here! With this knowledge, you can keep your workplace safe and sound. Let’s jump ...
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