The Complexometric Determination of Calcium and Magnesium in Limestone Using a Laser Photometer for Endpoint Identification

Mossman, Daniel M.; Kooser, Robert G.; Welch, Lawrence E.

doi:10.1021/ed073p82

Cited by 6 publications

(6 citation statements)

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“…The students practice data acquisition as part of another online lesson at home and calibrate (against an alcohol thermometer) the response of a thermistor to a cup of hot water as it cools. In the subsequent lab period students acquire data from a Spectronic 20 and then their own colorimeter (Figure ) based on an LED as a light source and a photodiode as a detector. − Later classes cover the principles of common light detectors and operational amplifiers.…”

Section: Introducing Microcontrollers Into the Instrumental Analysis ...mentioning

confidence: 99%

Teaching Electronics and Laboratory Automation Using Microcontroller Boards

Mabbott

2014

J. Chem. Educ.

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Modern microcontroller boards offer the analytical chemist a powerful and inexpensive means of interfacing computers and laboratory equipment. The availability of a host of educational materials, compatible sensors, and electromechanical devices make learning to implement microcontrollers fun and empowering. This article describes the advantages of using Arduino microcontroller boards for lab automation. It also includes lesson plans and exercises for teaching how to use them in the analytical chemistry curriculum. Two of these exercises include acquiring data from simple spectrometers and the control of a thermal cycler for PCR. The versatility of these devices will make them another important tool in the analytical chemist's toolkit.

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Section: Introducing Microcontrollers Into the Instrumental Analysis ...mentioning

confidence: 99%

Teaching Electronics and Laboratory Automation Using Microcontroller Boards

Mabbott

2014

J. Chem. Educ.

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“…These chelates are known and have been used in volumetric analysis , for a long time. They are being used for the quantitative determination of more than 45 elements by direct and back-titration procedures to obtain a visual end point , or by use of various techniques such as pH metry, spectrophotometry, capillary electrophoresis, high performance liquid chromatography, and ion chromatography . However, the exact use of these reagents for quantitative determination of lanthanides using a conductometric technique is still not known.…”

Section: Introductionmentioning

confidence: 99%

Conductometric Performance of Two-Pole and Five-Ring Conductivity Cell Probes for Lanthanide Determination Using EDTA and DCTA as Potential Sequestering Agents

Matharu

Mittal

Kumar

2012

Ind. Eng. Chem. Res.

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An improved conductometric titration method has been developed for the easy detection of lanthanides in the presence of interfering ions using a five-ring conductivity probe. These measurements were compared with those from a two-pole conductivity cell. Conductometric titrations of lanthanides with ethylenediaminetetraacetic acid (EDTA) and trans-1,2diaminocyclohexanetetraacetic acid (DCTA) as complexing agents were successfully carried out in the presence of alkaline earth metal ions, transition metal ions, and other metal ions, such as Al 3+ and Th 4+ , as interfering ions. The performance of the titrations of binary mixtures of Al(III) and lanthanides further improved and distinct end points corresponding to the stoichiometric ratio could be observed in mixed solvent media containing 1,4-dioxane (10−20%) which otherwise showed interference in aqueous media.

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“…The Web site for the cleaner confirmed that it contains EDTA along with isopropanol, surfactant, and fragrance (2). Several articles in this Journal and in textbooks provide additional information about chelating agents and complexometric titrations (3)(4)(5)(6)(7).…”

Section: Introductionmentioning

confidence: 99%

Determining the EDTA Content in a Consumer Shower Cleaner. An Introductory Chemistry Laboratory Experiment

Weigand

2000

J. Chem. Educ.

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At Altoona College, Chemistry 11 is offered to students as a preparatory course for the University's Chemical Principles course, Chem 12. A relevant laboratory is a source of motivation for the students to learn the chemistry. One way of making the laboratory relevant is to analyze the chemical components of consumer products. Several new shower-cleaning products have been introduced, which advertise that cleaning the shower is no longer necessary. The cleaners work using a combination of surfactants, alcohols, and a chelating agent. The Web site of a popular shower cleaner lists EDTA (ethylenediamine tetraacetate ion) as the chelating agent. The classic EDTA/calcium complexometric titration can be used to determine the EDTA content of the cleaner. This article describes the experiment to determine the EDTA content in a shower-cleaning product.

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The Complexometric Determination of Calcium and Magnesium in Limestone Using a Laser Photometer for Endpoint Identification

Cited by 6 publications

References 0 publications

Teaching Electronics and Laboratory Automation Using Microcontroller Boards

Teaching Electronics and Laboratory Automation Using Microcontroller Boards

Conductometric Performance of Two-Pole and Five-Ring Conductivity Cell Probes for Lanthanide Determination Using EDTA and DCTA as Potential Sequestering Agents

Determining the EDTA Content in a Consumer Shower Cleaner. An Introductory Chemistry Laboratory Experiment

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