Calcium hydroxide as a highly alkaline pH standard
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چکیده
منابع مشابه
Calcium Hydroxide as a Highly Alkaline pH Standard
The National Bureau of Standards conventional activity scale of pH is defined by a series of standard buffer solutions prepared from certified materials issued as N BS Stan dard Samples. The five standards thus far established cover the pH range 1.68 to 9.18 at 25° . In order to increa e t he accuracy of m easurements at high pH, a highly alkaline standard is needed. A solut ion of calci um hyd...
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Background and Aim: Therapeutic effects of calcium hydroxide as an intra-canal medicament depend on its decomposition into hydroxyl and calcium ions. The aim of this study was to determine the diffusion amount of calcium ion and ph changes around the tooth root in the application of conventional calcium hydroxide and Nano particle calcium hydroxide at different times. Material and Methods: In ...
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Calcium ions have very strong affinity and binds effectively to alizarin red dye during staining of biomaterials. This promotes us to choose calcium hydroxide as a low cost adsorbent for the removal of alizarin red dye. Various parameters such as pH, concentration, dose of adsorbent, time, and temperature have been investigated. In addition, enthalpy, entropy, free energy and activation energy ...
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A robust and re-usable dipstick-type fluorescent pH sensor for the alkaline pH range was developed by embedding a brightly fluorescent boron-dipyrromethene (BODIPY) dye bearing an acidic phenol moiety into a polyurethane matrix immobilized on a 3D epoxy-functionalized polymer support. The sensor strip has a dynamic working range of pH 10.0-13.1, i.e., operates in strongly basic media where pH g...
متن کاملDETERMINATION Of pH AND CALCIUM ION RELEASE PROVIDED BY DIffERENT CALCIUM HYDROXIDE PASTES
Background and Aim: To evaluate the pH and calcium ion (Ca2+) release of calcium hydroxide (Ca(OH)2) powder mixed with 3 different vehicles and one Ca(OH)2-based commercial paste. Materials and Methods: Forty-five polyethylene tubes with simulated root canals were used and divided into four groups (n=10); Group 1: Ca(OH)2 based-paste (SURE-Paste), Group 2: Ca(OH)2 powder mixed with articainHCl+...
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ژورنال
عنوان ژورنال: Journal of Research of the National Bureau of Standards
سال: 1956
ISSN: 0091-0635
DOI: 10.6028/jres.056.040