pH Monitoring Articles

  • Case study - Why good incubator management is critical for IVF clinics

    There is a large and growing number of fertility clinics throughout the UK, all registered on the Human Fertilisation and Embryology Authority (HFEA) database.  Each clinic is carefully monitored and assessed by the HFEA to ensure patients are protected and receive a service of high standard – even the clinic’s ‘Success Rates’ and ‘Inspection Reports’ are ...


    By Geotech

  • Using CoBupH MG to adjust aquifer pH - Case Study

    Problem A US Government site had elevated TCE. Low aquifer pH stalled in situ bioremediation. ...


    By EOS Remediation, LLC

  • 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.

  • Skid Systems - Case Study

    A Chemical Metering Pump is seldom used by itself. It is usually a part (ok, the part) of a chemical injection system into a process. Such a system requires various accessories, valves and controls to dispense the exact amount of chemical demanded by the application which may itself vary. Let us say if you are using chemical pump to achieve pH balance for the water. You need to measure the pH of ...

  • Impact of pH on Derivatization of Nitrophenol Compounds

    Our goal of evaluating the Normalized French Environmental Method 12673 required testing the method’s ability to derivatize nitrophenols and alkylphenols in addition to the chlorophenols the method was designed for. Unfortunately, nitrophenols proved challenging to derivatize at low concentrations. In an effort to improve the derivatization of nitrophenols, we experimented with the pH of ...


    By Restek Corporation

  • 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

  • Effect of pH on the flocculation behaviors of kaolin using a pH-sensitive copolymer

    pH-sensitive copolymers have been widely introduced to achieve rapid dewatering and consolidation of solids in mining and oil sands processing wastes. But no more attention has been given to the flocculation efficiency of solid suspensions as a function of pH using pH-sensitive copolymer. In this study, a pH-sensitive copolymer was synthesized and employed to investigate the flocculation ...


    By IWA Publishing

  • Destabilization dynamics of clay and acid-free polymers of ferric and magnesium salts in AMD without pH adjustment

    The physicochemical treatment was employed to treat acid mine drainage (AMD) in the removal of turbid materials using clay only (exp A) and a combination of clay, FeCl3 and Mg(OH)2 (exp B) to form a polymer. A 5 g sample of clay (bentonite) was added to 1.2 L of AMD and treated in a jar test at 250 rpm for 2 min and reduced to 100 rpm for 10 min. A 200 mL sub-sample from the 1.2 L mother ...


    By IWA Publishing

  • 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.

  • Why good incubator management is critical for IVF clinics

    There is a large and growing number of fertility clinics throughout the UK, all registered on the Human Fertilisation and Embryology Authority (HFEA) database.  Each clinic is carefully monitored and assessed by the HFEA to ensure patients are protected and receive a service of high standard – even the clinic’s ‘Success Rates’ and ‘Inspection Reports’ are ...


    By Geotech

  • Removal of hexavalent chromium from aqueous solution by calcined Zn/Al-LDHs

    In this study, Zn/Al-layered double hydroxides (Zn/Al-LDHs) were synthesized by a co-precipitation method and characterized with X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. Then the hexavalent chromium Cr(VI) adsorption experiments on calcined Zn/Al-LDHs were carried out to analyze the effects of pH, temperature, adsorption time, initial Cr(VI) ...


    By IWA Publishing

  • Predicted and observed therapeutic dose exceedances of ionizable pharmaceuticals in fish plasma from urban coastal systems

    Instream flows of the rapidly urbanizing watersheds and estuaries of the Gulf of Mexico in Texas (USA) are increasingly dominated by reclaimed waters. Though ionizable pharmaceuticals have received increasing attention in freshwaters, many research questions remain unanswered, particularly in tidally influenced urban coastal systems, which experience significant spatiotemporal variability in ...


    By John Wiley & Sons, Ltd.

  • Inhibition of unwanted nitrification

    Respirometer The respirometer utilized in this study corresponds to the BM-Advance model, with the following main features: Compact analyzer, with very low maintenance and user friendly operation Direct oxygen measurements from a maintenance-free oxygen sensor No oxygenation restriction during test performance Full control and results by ...


    By SURCIS, S.L.

  • Microfiltration of vinasse: sustainable strategy to improve its nutritive potential

    The purpose of this article was to evaluate and establish microfiltration (MF) operating conditions for vinasse (ethanol industries wastewater also known as stillage, slop, distillery effluent or dunder) concentration aiming to improve the use of its nutritive potential. The operating conditions influence permeate flux that has been evaluated by monitoring the flow rate profile during the ...


    By IWA Publishing

  • Adsorption of Pb2+ from aqueous solution using spinel ferrite prepared from steel pickling sludge

    In this paper, spinel ferrite with high crystallinity and high saturation magnetization was successfully prepared from steel pickling sludge by adding iron source and precipitator in the hydrothermal condition. The obtained spinel ferrite was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), vibrating sample magnetometer (VSM), and Zeta potential ...


    By IWA Publishing

  • Rapid small-scale column tests for Cr(VI) removal by granular magnetite

    This study evaluates the possibility of using magnetite as an adsorbent for the removal of Cr(VI) in a bed column setup under continuous flow conditions. For this purpose, granular magnetite was synthesized on a large scale and tested in both batch and rapid small-scale column experiments using reliable conditions of drinking water treatment. Column tests, which were designed to scale-down ...


    By IWA Publishing

  • 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

  • Biogas production in an anaerobic sequencing batch reactor by using tequila vinasses: effect of pH and temperature

    In recent years, anaerobic digestion has been recognized as a suitable alternative for tequila vinasses treatment due to its high energy recovery and chemical oxygen demand (COD) removal efficiency. However, key factors such as the lack of suitable monitoring schemes and the presence of load disturbances, which may induce unstable operating conditions in continuous systems, have limited its ...


    By IWA Publishing

  • Comparative studies on adsorptive removal of heavy metal ions by biosorbent, bio-char and activated carbon obtained from low cost agro-residue

    In this study, Fe(III) and Cr(III) metal ion adsorption processes were carried out with three adsorbents in batch experiments and their adsorption performance was compared. These adsorbents were sesame stalk without pretreatment, bio-char derived from thermal decomposition of biomass, and activated carbon which was obtained from chemical activation of biomass. Scanning electron microscopy and ...


    By IWA Publishing

  • Kinetics and equilibrium adsorption study of p-nitrophenol onto activated carbon derived from walnut peel

    An original activated carbon prepared from walnut peel, which was activated by zinc chloride, was modified with ammonium hydroxide or sodium hydroxide in order to contrast the adsorption property of the three different activated carbons. The experiment used a static adsorption test for p-nitrophenol. The effects of parameters such as initial concentration, contact time and pH value on amount ...


    By IWA Publishing

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