713 ph meter

Manufactured by Metrohm

Sourced in Switzerland

The 713 pH meter is a laboratory instrument designed for precise pH measurement. It provides accurate and reliable pH readings, enabling users to monitor and control the pH of various samples in a wide range of applications.

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Lab products found in correlation

Uv 1800, by Shimadzu (2 mentions) Drp 110, by Metrohm (2 mentions) Glass electrode, by Metrohm (2 mentions) 8453 spectrometer, by Agilent Technologies (2 mentions) X pert diffractometer, by Philips (2 mentions) Lambda 35, by PerkinElmer (2 mentions) Tensor 2 spectrometer, by Bruker (1 mentions) Mira3 scanning electron microscope, by TESCAN (1 mentions) Deionized water, by Merck Group (1 mentions) Pgstat302n, by Metrohm (1 mentions) Reagent grade chemicals, by Merck Group (1 mentions) Elmasonic s30h, by Elma Schmidbauer (1 mentions) Invenio s, by Bruker (1 mentions) Sodium acetate c2h3nao2, by Merck Group (1 mentions) Ethylene glycol c2h6o2, by Merck Group (1 mentions) Methylene blue, by Merck Group (1 mentions) Hydrochloric acid (hcl), by Merck Group (1 mentions) Ethanol c2h5oh, by Merck Group (1 mentions) Inova 500, by Agilent Technologies (1 mentions) Gemini c18, by Phenomenex (1 mentions)

16 protocols using 713 ph meter

Electrochemical Sensor Fabrication and Characterization

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An Autolab PGSTAT 320N Potentiostat/Galvanostat Analyzer (Herisau, Switzerland) with GPES (General Purpose Electrochemical System-version 4.9) software was applied for all electrochemical determinations at ambient temperature. The electrochemical sensors were prepared by DRP-110 SPEs (DropSens, Oviedo, Spain) usingsilver pseudo-reference electrode, graphite working electrode, and graphite auxiliary electrode. A Metrohm 713 pH meter with a glass electrode (Metrohm AG, Herisau, Switzerland) was selected to determine and adjust the solutions’ pH. Direct-Q^® 8 UV deionized water (Merck Chemicals GmbH, Darmstadt, Germany) was used to prepare fresh solutions.
A PANalytical X’Pert-PRO X-ray diffractometer (Almelo, The Netherlands) applying a Cu/Kα radiation (λ:1.54 Å) was used for X-ray-diffraction (XRD) analysis, and a Bruker Tensor II spectrometer (Bruker, Karlsruhe, Germany) was employed to capture the Fourier transform infrared (FT-IR) spectra. A MIRA3 scanning electron microscope coupled with an energy-dispersive X-ray spectroscopy (EDS) detector (Tescan, Brno, Czech Republic) was utilized for field-emission scanning electron microscopy (FE-SEM) (Tescan, Brno, Czech Republic) images and elemental analysis.

Beitollahi H., Garkani Nejad F., Tajik S, & Di Bartolomeo A. (2022). Screen-Printed Graphite Electrode Modified with Graphene-Co3O4 Nanocomposite: Voltammetric Assay of Morphine in the Presence of Diclofenac in Pharmaceutical and Biological Samples. Nanomaterials, 12(19), 3454.

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Potentiometric Titration of Nitrate Chelators

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Potentiometric titrations were conducted
using an automated titrating system (Metrohm 765 Dosimat) equipped
with a combined glass electrode (Hamilton pH 0–14) and a Metrohm
713 pH meter at T = 25 °C under a N₂ atmosphere. NaNO₃ (0.15 M) was used to fix the ionic
strength. Stock solutions of NO3S and TACN-n-Bu were
freshly prepared by dissolution of the synthesized compounds (∼10^–3 M). To avoid carbonatation phenomena and facilitate
the dissolution, prestandardized HNO₃ (C_H⁺ = 4C_L) was coadded
to each ligand solution. The solubility of the ligands in water depends
on pH: minimal values occur at pH > 12, where the noncharged, totally
deprotonated form predominates. All of the titrations were conducted
as previously described.^{22 (link)−25 (link)} Potentiometric measurement demonstrated that the
purity of the synthesized chelators was >95%. Each titration was
performed
independently, at least in quintuplicate.

Tosato M., Franchi S., Isse A.A., Del Vecchio A., Zanoni G., Alker A., Asti M., Gyr T., Di Marco V, & Mäcke H. (2023). Is Smaller Better? Cu2+/Cu+ Coordination Chemistry and Copper-64 Radiochemical Investigation of a 1,4,7-Triazacyclononane-Based Sulfur-Rich Chelator. Inorganic Chemistry, 62(50), 20621-20633.

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Electrochemical Characterization of Gr-Co3O4 NC/CPE

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In order to do electrochemical tests at ambient temperature, we utilized the Auto-lab potentiostat/galvanostat (PGSTAT 302N, Eco Chemie, the Netherlands) with GPES (General Purpose Electrochemical System-version 4.9) software to control the system. Electrochemical measurements were performed at room temperature in a conventional electrochemical cell with a Gr-Co₃O₄ NC/CPE as the working electrode, 3.0 M Ag/ AgCl/KCl as a reference electrode (Azar Electrode, Urmia, Iran) and platinum wire as a counter electrode (Azar Electrode, Urmia, Iran). Moreover, pH was measured using the Metrohm 713 pH meter with a glass electrode (Switzerland). Propranolol and all other solutions used during the procedure were prepared by reagent-grade chemicals from Merck and Sigma-Aldrich and deionized water was supplied from Millipore, Germany.

Karami-Kolmoti P, & Zaimbashi R. (2023). An electrochemical sensing platform based on a modified carbon paste electrode with graphene/Co3O4 nanocomposite for sensitive propranolol determination. ADMET & DMPK, 11(2), 227-236.

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Spectroscopic Analysis of Natural Reagent from Dipterocarpus intricatus

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UV-Visible spectroscopy (UV-1800, Shimadzu, Kyoto, Japan) was employed to scan spectra and measure the absorption values of the extraction phases. FT-IR (INVENIO-S, Bruker, Leipzig, Germany) was used to confirm the functional groups of the natural reagent extracted from Dipterocarpus intricatus Dyer and compare results with the tannic acid standard. An ultrasonic bath (Elmasonic S 30 H, Elma, Singen, Germany) was utilized to assist the extraction. A benchtop centrifuge (Hettich Zentrifugen, Tuttlingen, Germany) was used to separate the surfactant-rich phase, and a cooking blender (Electrolux, Bangkok, Thailand) was employed to grind the natural reagent and vegetable samples. A furnace (CWF, Carbolite, Hope, UK) was utilized to incinerate vegetable samples. All pH measurements were made using a 713-pH meter (Metrohm, Herisau, Switzerland). A flame atomic absorption spectrometer (FAAS, Agilent Technologies, Santa Clara, CA, USA) was used to detect iron concentration as the standard method, with results compared to the developed method.

Supharoek S.A., Weerasuk B., Siriangkhawut W., Grudpan K, & Ponhong K. (2022). Ultrasound-Assisted One-Pot Cloud Point Extraction for Iron Determination Using Natural Chelating Ligands from Dipterocarpus intricatus Dyer Fruit. Molecules, 27(17), 5697.

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Electrochemical Characterization of Analytes

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All chemicals used were of analytical reagent grade purchased from Sigma-Aldrich and were used as received without any further purification. Double-distilled water was used throughout all experiments. Orthophosphoric acid was utilized to prepare the phosphate buffer solutions (PBSs), and sodium hydroxide was used to adjust the desired pH values (pH range between 2.0 and 9.0).
Cyclic voltammetry (CV), linear sweep voltammetry (LSV), chronoamperometry, and differential pulse voltammetry (DPV) investigations were performed in an electroanalytical system Autolab PGSTAT302N, potentiostat/galvanostat connected to an electrode cell, the SPGE (DropSens; DRP-110: Spain), containing graphite counter electrode, a graphite working electrode, and a silver pseudo-reference electrode. The system was run on a PC using General Purpose Electrochemical System (GPES) software. Solution pH values were determined using a 713 pH meter combined with a glass electrode (Metrohm, Switzerland).

Jahani P.M., Jafari M, & Ahmadi S.A. (2023). Voltammetric determination of vitamin B6 in the presence of vitamin C based on zinc ferrite nano-particles modified screen-printed graphite electrode. ADMET & DMPK, 11(2), 251-261.

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UV–Vis Spectroscopy Protocol

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UV–vis
absorption
spectra were recorded with an Agilent 8453 spectrometer. Solvents
were of spectroscopic or equivalent grade. The pH of samples was measured
with a Metrohm 713 pH meter, and adjustments of the hydrogen ion concentration
were made with diluted HCl and NaOH solutions.

Martínez-Camarena Á., Savastano M., Blasco S., Delgado-Pinar E., Giorgi C., Bianchi A., García-España E, & Bazzicalupi C. (2021). Assembly of Polyiodide Networks with Cu(II) Complexes of Pyridinol-Based Tetraaza Macrocycles. Inorganic Chemistry, 61(1), 368-383.

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Stable Albumin-Dye Formulation

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ADF was developed in a preliminary study and showed chemical stability over 3 months without precipitation. The solution contained 2.5 g/l methylene blue, 35 g/l albumin (bovine serum albumin, Fraction V, Art. 1.12018, Merck KG, Darmstadt, Germany), 2.5 mM PO₄³⁻, 2.35 mM Ca²⁺, 4.7 mM Cl⁻, 1.0 mM K⁺ and 3.81 mM Na⁺. The pH of the ADF was 7.0 and tested with a standard pH electrode (713 pH Meter, Metrohm, Zofingen, Switzerland). To avoid irreversible precipitation of some of the ingredients, albumin, inorganic compounds and methylene blue were separately solved in deionized water prior to mixing. The osmolarity of the solution was 32 mOsm (Fiske one-ten, Fiske Associates, Needham Heights, MA, USA).

Jungbluth H., Attin T, & Buchalla W. (2014). Development and validation of an in vitro model for measurements of cervical root dentine permeability. Clinical Oral Investigations, 18(9), 2077-2086.

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Sequential Injection Analysis for Tannin and Iron Determination

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The manifold of sequential injection analysis (SIA) for the proposed method is shown in Fig. 1a. The system comprised a bidirectional syringe pump (5000 μL, CAVRO, San Jose, CA), 10 selection valve ports (Valco instruments, Houston, TX, USA), a holding coil (250 cm PTFE tubing; OD 1/16′′, ID 0.03′′), one mixing coil (PTFE tubing, ID 0.5 mm, 50 cm long), three 400 μL reaction coils (PTFE tubing, ID 0.5 mm, 205 cm long), and PTFE tubing (ID 0.5 mm). A detection unit including a tungsten lamp as a light source, a spectrophotometer (AvaSpec-3648 StarLine, Avantes, Netherlands), and optic fiber cables (ID 400 nm, 2 m) with a flow through cell (Quartz 10 mm path length, 80 μL internal volume) was utilized for measurement of absorbance at 430 and 560 nm. An avasoft 8.0 Avantes Fiber Optic Spectrometer was used for data acquisition. In-house created software based on Visual Basic 6.0 was used to automatically operate the SI system. A spectrophotometer (UV-1800, Shimadzu, Japan) was used for preliminary screening of tannin compost in various plants and as the standard method to determine nitrite. FAAS (Varian Model AA240FS, USA) measurements were utilized as the standard method for determination of iron. All pH measurements were performed using a 713 pH meter (Metrohm, Herisau, Switzerland).

Ponhong K., Siriangkhawut W., Lee C.Y., Teshima N., Grudpan K, & Supharoek S.A. (2022). Dual determination of nitrite and iron by a single greener sequential injection spectrophotometric system employing a simple single aqueous extract from Areca catechu Linn. serving as a natural reagent. RSC Advances, 12(31), 20110-20121.

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Seawater Carbonate Chemistry Analysis

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Nutrient concentrations: nitrate, nitrite, silicic acid and phosphorus were analysed following the methods described in Strickland and Parsons^{123 (link)}. Total pH (pH_T) was measured in a closed 25 ml cell, thermostatically controlled at 25 °C, using a Metrohm 713 pH meter calibrated with Tris buffer (pH = 8.089) at 25.0 °C. Total alkalinity (A_T) was determined by potentiometric titration in an open cell, according to Haraldsson et al.¹²⁷. The pH_T, A_T and salinity were used to calculate the rest of the seawater carbonate chemistry parameters, using CO2SYS software¹²⁸ for experiments I and II (Table 2).

Fernández P.A., Navarro J.M., Camus C., Torres R, & Buschmann A.H. (2021). Effect of environmental history on the habitat-forming kelp Macrocystis pyrifera responses to ocean acidification and warming: a physiological and molecular approach. Scientific Reports, 11, 2510.

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Spectroscopic Analysis of Aqueous Solutions

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The solvents used were of spectroscopic or equivalent grade. Water was twice distilled and passed through a Millipore apparatus. The pH values were measured with a Metrohm 713 pH meter and adjustments of the hydrogen ion concentration of the solutions were made with diluted HCl and NaOH solutions. UV-Vis absorption spectra were recorded with an Agilent 8453 spectrometer.

Martínez-Camarena Á., Llinares J.M., Domenech-Carbó A., Alarcón J, & García-España E. (2019). A step forward in the development of superoxide dismutase mimetic nanozymes: the effect of the charge of the surface on antioxidant activity. RSC Advances, 9(71), 41549-41560.

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