pH/ORP Monitoring Articles

  • New ISFET pH meter PCE-ISFET

    The new PCE-ISFET pH meter from PCE Instruments has been designed for food applications. The glass free electrode makes it particularly safe to use in food production as no glass splinters can get into the food if the electrode breaks. Unlike glass pH electrodes, ISFET pH sensors are highly resilient and do not require wet storage. They give reliable results under tough conditions. The PCE-ISFET ...


    By PCE Instruments

  • Dilurit® CaR-System: Improvement in deposit control

    Learn more about Kurita´s developed and patented Dilurit® CaR-System - the innovative improvement in deposit control: https://www.slideshare.net/KuritaGlobal/dilurit-carsystem-improvement-in-deposit-control Dilurit® CaR-System is a mild oxidizing biocide in ...


    By Kurita

  • Sorption equilibrium, thermodynamics and pH-indicator properties of cresyl violet dye/bentonite composite system

    The aim of the present study was to develop cresyl violet (CV)/bentonite composite system, to investigate the equilibrium sorption of the fluorescent dye on bentonite, to determine the characteristic equilibrium and thermodynamic parameters of the system by appropriate empirical isotherm models and to assess its pH-indicator properties. The absorption characteristics of CV solutions were ...


    By IWA Publishing

  • Tech Tip: SeaFET/SeapHOx pH Pre-conditioning

    The SeaFET/SeapHOx must condition to the deployment environment for at least 48 hours before pH data is considered reliable. The Shallow SeaFET’s external pH sensor must be powered and exposed to the deployment site’s water for 2–5 days before obtaining quality data. You will often see the external pH gradually rise until it meets the internal reference pH within ~0.05 pH after ...

  • Treatment of Cyanide Bearing Wastewaters

    Water Innovations utilizes a 2-stage Cyanide Oxidation (CN) system that can treat from 2 GPM to 10 GPM. In the first stage of treatment, hypochlorite oxidizes cyanide to cyanate. It consists of two double-wall “Batch” Cyanide Oxidation Tank and an accumulation tank for cyanide-bearing rinse water, each tank equipped with one mixer. Wastewater containing cyanide will be pumped or flow ...


    By Water Innovations, Inc

  • Instrumentation and Operational Considerations for On-Line pH Measurement in Samples Below 10µS/cm Conductivity

    Ordinarily pH measurements are made in water with 1,000 to 10,000 µS/cm conductivity. The conductivity comes from dissolved solids which are typically salts but also acid or base. These dissolved substances are in the solution in ion form which makes such solutions conducting. With conductivities of 1,000 µS/ cm or more, an ample supply of mobile ions provides pH electrodes with a ...


    By IC Controls Ltd.

  • pH measurement: Six technical tips

    The pH value is one of the most important and therefore also one of the most frequently measured quantities in analytical chemistry. Sometimes, a simple pH test strip is sufficient for making a rapid check; precise pH meters are, however, required whenever accurate measuring results are needed. Such a pH meter is available in nearly every laboratory and is generally ready for use at a moment's ...


    By Metrohm AG

  • pH/ORP Sensors for Metallurgical Applications

    Importance of pH Measurement Hydrometallurgical concentrating and refining applications require pH/ORP sensors to withstand aggressive environments while maintaining accurate measurement. Processes such as cyanide leaching (e.g gold) and solvent extraction (e.g. copper, nickel, zinc) require pH and ORP to be at very specific values to yield the desired chemical species. pH may need ...


    By IC Controls Ltd.

  • Ivanhoe Industries Xf-970 Antifoam Evaluation With 2% MICRO-90

    SUMMARY 0.25% XFO-970 is recommended to customers as an effective antifoam in 2% Micro-90 without sacrificing detergency, pH, or leaving an oily residue. PURPOSE To determine if XFO-970 is an effective tank-side antifoam additive for a 2% Micro-90 bath. INTRODUCTION Ivanhoe Industries performed tests to determine which of their ...

  • How should I clean a pH electrode, or revive a damaged electrode?

    Traditional glass pH electrodes are very delicate and need regular care to keep them in good working order. If your electrode has been damaged by exposure to incompatible chemicals such as proteins, heavy metals or sulphides, you may be able to clean and revive it using specialized cleaning solutions… pH electrodes that have a single junction are particularly susceptible to damage, and can ...


    By Camlab Limited

  • New Guide from METTLER TOLEDO on Increasing pH Sensor Lifetime

    Proper care of pH sensors can dramatically increase their lifetime. A new guide from METTLER TOLEDO explains, step-by-step, how Intelligent Sensor Management (ISM®) technology provides maximum lifetime for pH probes. Urdorf, Switzerland – Over time and through use, pH sensors are affected by their measuring environment and require cleaning, calibrations and adjustments to ensure ...


    By Mettler - Toledo Int. Inc

  • Buy Smarter – what questions should you ask when buying a pH meter?

    When you’re looking to buy a pH meter, whether it’s to start measuring or to replace an existing meter, the range of brands and specifications available is huge. With so many options it can be difficult to know where to start, but taking a little time to choose carefully could save you a lot of time and money overall by making sure the meter you choose is right for ...


    By Camlab Limited

  • Biofilters vs Asdorption

    In the last three decades biological technologies have emerged as a sustainable and economically-viable alternative compared to traditional techniques like adsorption/absorption for purifying gases. They were well-received initially in the industry and interesting products with good results were carried out for several years. However, owing to a series of reasons that will be detailed in this ...


    By Bioconservacion SA

  • How can I measure the pH of food?

    Measuring pH in food is a useful indicator of consistency over batches for quality control but can also be used to monitor foods where the pH changes over time – for example in yogurt production, brewing or to test the freshness of foods. Standard pH electrodes will often struggle when used in food samples, as the reference junction becomes blocked the reaction time will get slower and ...


    By Camlab Limited

  • `Good to Go™ tags´ manage your daily or weekly calibration and safety checks

    Keeping up with safety regulations can be complicated and time-consuming. Having an easy to complete, simple visual guide to carry out safety or calibration checks solves this problem and helps to keep the workplace safe. One glance and you can see the equipment is “Good to ...


    By Camlab Limited

  • What are the key steps in measuring pH? Why do I need to calibrate?

    pH is a useful parameter which is used across all industries for quality control, environmental monitoring, lab work and much more. There are 10 key steps which should be followed to ensure pH measurements using a meter are accurate. pH is a useful parameter which is used across all industries for quality control, environmental monitoring, lab work and much ...


    By Camlab Limited

  • Stop metal losses in processes with Sulphide, Cyanide, Ammonia and Pressure Fluctuations

    Abstract Losses of metal are often traced to incorrect pH/ORP signals in floatation, leaching, extraction, electrolysis, and precipitation processes, aggravated by pressure changes. IC Controls a Canadian mining sensor manufacturer developed a new superior pH/ORP sensor that stops metal losses, reduces environmental footprint and contributes to sustainability. The cause of incorrect pH/ORP ...


    By IC Controls Ltd.

  • Hydrogen ion sensing characteristics of IGZO/Si electrode in EGFET

    In–Ga–Zn–O (IGZO) was widely applied in the substrate of TFT to replace α–Si in recent years. In this study, IGZO layer with thickness of 70 nm is firstly proposed as a pH–sensing membrane directly deposited on P–type Si substrate acting as an extended gate of conventional extended–gate field–effect transistor (EGFET). Post–deposition rapid thermal anneal (RTA) was performed to improve pH sensing ...


    By Inderscience Publishers

  • Influence of soil pH on the toxicity of zinc oxide nanoparticles to the terrestrial isopod Porcellionides pruinosus

    The effects of soil pH on the toxicity of ZnO nanoparticles (NPs) to the terrestrial isopod Porcellionides pruinosus were evaluated. Isopods were exposed to a natural soil amended with CaCO3 to reach three different pHCaCl2 levels (4.5, 6.2 and 7.3) and standard Lufa 2.2 soil (pH 5.5) spiked with ZnO NPs (30 nm), non‐nano ZnO (200 nm) and ionic Zn as ZnCl2. Toxicity was expressed based on ...


    By John Wiley & Sons, Ltd.

  • Relationships between soil properties and toxicity of copper and nickel to bok choy and tomato in Chinese soils

    The toxicity of copper (Cu) and nickel (Ni) to bok choy and tomato shoot growth was investigated in a wide range of Chinese soils with and without leaching with artificial rainwater. The results showed that the variations of Ni toxicity induced by soil properties were wider than that of Cu toxicity to both tomato and bok choy plant growth. Leaching generally decreased the toxicity of Cu and Ni ...


    By John Wiley & Sons, Ltd.

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