Continuous flow two-point titration system for chloride using a pair of silver/sulfide ion selective electrodes

Hara, Hirokazu; Wakizaka, Yoshiki; Okazaki, Satoshi

doi:10.1021/ac00298a051

Cited by 11 publications

(3 citation statements)

References 14 publications

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“…These results may be compared with those obtained from the triangle programmed argentometric flow titration of CT in wastewater, which yielded standard deviations for single samples of 1-2% (24,27). A continuous flow two-point titrimetric method has been reported for CT at levels below 18 mg/L (28). Precision of 0.9% and accuracy of 2% were found, results that are comparable to those reported here.…”

Section: Resultssupporting

confidence: 85%

Automated titrations using a discontinuous programmed flow analyzer

Arnold¹,

Peachey²,

Petty³

et al. 1989

Anal. Chem.

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The technique of automated discontinuous programmed flow analysis Is described, together with a working prototype Instrument employing syringe pumps driven by Interchangeable cams. This technique relies on the cyclic generation of flow profiles for both a suction and a discharge pump, such that at various times sample only, reagent only, or a predefined combination of the two Is conveyed via a mixing chamber to a detector. Different cam profiles allow a number of direct reading or reagent addition analysis methods, as well as both single and dual flow titrations. Results are presented for argent ometrlc titrations of chloride In water using as detectors anodized silver microelectrodes contained In two alternative mixer/sensor assemblies. In the range of 60-160 mg/L, precision for analysis times of 30 s or less is typically better than 1 %, with sample consumption of 0.9 mL. Accuracy for chloride determinations In city water samples Is limited by the characteristics of the electrodes to ca. 2-3 %. Cycle times for this Instrument are selectable from 6 to 90 s. Carryover from sample to sample Is negligible because of the incorporation of a sample flush step to commence each cycle. The operating characteristics of this analyzer were studied by using a conductivity detector, and pump displacement precision Is better than 0.1%.

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Section: Resultssupporting

confidence: 85%

Automated titrations using a discontinuous programmed flow analyzer

Arnold¹,

Peachey²,

Petty³

et al. 1989

Anal. Chem.

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“…between Y and X. Table 5 shows the determination far some test solutions by the linear plots of equations (6) and (7).…”

Section: Resultsmentioning

confidence: 99%

Improvement of Gran'S Plot Method in Standard Addition and Subtraction Methods by a New Plot Method

1991

Analytical Letters

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“…Recently, Gray and Unwin (2) have reported a simple method for the preparation of Ag/AgCl microelectrode. Electrochemical preparation and behavior of silver modified with silver sulfide have also been extensively studied which usually have been used for the preparation of ion-selective electrodes for silver and sulfide ions (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19). Ag/Ag 2 S electrodes have prepared by various methods including anodic polarization of silver rod in sodium sulfide solution, by dipping the platinum spiral, coated with porous silver, into a solution of hydrogen sulfide, by sulfidizing the silver wire with sulfur vapor in nitrogenous atmosphere, by sulfidizing with copper-alloyed silver wire in a saturated alkaline solution of sodium sulfide, etc.…”

Section: Introductionmentioning

confidence: 99%

Chemical Sensor Based on Silver/Silver Sulfide Microelectrode

Eftekhari

2001

Analytical Letters

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A simple method was used for the preparation of ionselective electrodes for silver and sulfide ions with micrometric and small dimensions. The electrode was fabricated by etching a silver wire to a fine point and then coating with an electrophoretically deposited paint, which is subsequently heat-cured to isulate all but the very end of the tip. The constructed electrode exhibits a potentiometric response to silver and sulfide ions with Nernstian slopes. The sensor has a linear response in the concentration ranges from 1 Â 10 À6 to 1 Â 10 À1 and from 1 Â 10 À7 to Â 10 À1 M for silver and sulfide ions, respectively. The microelectrode could be used as the indicator electrode for measuring both Ag þ and S 2À by analytical titration. The introduced microelectrode is simple and has long-term stability.

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Continuous flow two-point titration system for chloride using a pair of silver/sulfide ion selective electrodes

Cited by 11 publications

References 14 publications

Automated titrations using a discontinuous programmed flow analyzer

Automated titrations using a discontinuous programmed flow analyzer

Improvement of Gran'S Plot Method in Standard Addition and Subtraction Methods by a New Plot Method

Chemical Sensor Based on Silver/Silver Sulfide Microelectrode

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