Flow-injection analysis of trace elements by use of catalytic reactions

Kawashima, Takuji; Nakano, Shin-ichi

doi:10.1016/0003-2670(92)80188-d

Cited by 41 publications

(6 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…49,50 Most indicator reactions used in the kineticcatalytic methods are redox reactions of various organic substances in which a catalyst (C), usually a multivalent ion, changes its oxidation state to form C′ during the reaction in a cyclic manner. The rapid regeneration of C leads to the catalytic formation of the product P in an indicator reaction.…”

Section: Redox System With Ligand Effect As An Indicator Reaction In mentioning

confidence: 99%

Development of Novel Redox Systems by Use of Ligand Effect and Its Application to Potentiometry

2000

Self Cite

View full text Add to dashboard Cite

Section: Redox System With Ligand Effect As An Indicator Reaction In mentioning

confidence: 99%

Development of Novel Redox Systems by Use of Ligand Effect and Its Application to Potentiometry

2000

Self Cite

View full text Add to dashboard Cite

“…1 In catalytic methods based on metal-catalyzed reactions, the addition of a ligand as an activator to the reaction system improves their sensitivity and/or selectivity. 2,3 Another possibility for improving the sensitivity is to use a surfactant which is able to form organized assemblies. Perez-Bendito et al 4 found that a copper-catalyzed reaction of N,N-dimethyl-pphenylenediamine with N,N-dimethylaniline in the presence of hydrogen peroxide 5,6 was accelerated by anionic sodium dodecylsulfate (SDS) and cationic dodecyltrimethylammonium bromide (DTAB) micelles.…”

mentioning

confidence: 99%

“…On the other hand, the adaptation of a flow injection analysis (FIA) to the catalytic methods leads to many advantages, i.e., the reagent addition and the reaction time can be easily controlled and a large number of samples can be measured automatically with high precision. 2 Many indicator reactions have been applied to the FIA method for copper determination. [19][20][21][22][23][24] However, few papers on the use of a surfactant for a catalytic flowinjection determination of copper have been published.…”

mentioning

confidence: 99%

Flow-Injection Determination of Copper(II) Based on Its Catalytic Effect on the Oxidative Coupling of 3-Methyl-2-benzothiazolinone Hydrazone with N-Ethyl-N-(2-hydroxy-3-sulfopropyl)-3,5-dimethoxyaniline in a Micellar Medium

et al. 1999

Self Cite

View full text Add to dashboard Cite

A highly sensitive flow-injection spectrophotometric method has been developed for the determination of copper(II). It is based on the catalytic effect of copper(II) on the oxidative coupling reaction of 3-methyl-2-benzothiazolinone hydrazone with N-ethyl-N-(2-hydroxy-3-sulfopropyl)-3,5-dimethoxyaniline to form a red compound (λmax=525 nm) in the presence of hydrogen peroxide and pyridine as an activator. A higher sensitivity and sampling rate were achieved by adding benzyldimethyltetradecylammonium chloride (Zephiramine) as a surfactant to this reaction system. The calibration graph for copper(II) was linear over the range 0.005 -0.75 ng cm −3 at a rate of 40 samples h −1. The relative standard deviations for ten determinations of 0.5 and 0.05 ng cm −3 were 0.21 and 2.0%, respectively. The proposed method was successfully applied to the determination of copper in pepperbush.

show abstract

“…However, even when modified to give better reproducibility (Weiguo 1983) the method requires a 40-min color-development time and 5-cm cuvettes for a detection limit of 4 nM. Kawashima and Nakano (1992) reviewed bromate-based catalytic colorimetric methods for V determination; these methods are generally rapid but also frequently suffer from iron interferences. Sugiyama and Hori (1992) described a continuous-flow system utilizing the catalytic effect of V on the bromate oxidation of Bindschedler's green leuco base (BGL).…”

mentioning

confidence: 99%

Determination of dissolved vanadium in natural waters by flow injection analysis with colorimetric detection

Shiller¹,

Mao²,

Cramer³

1998

Limnology & Oceanography

View full text Add to dashboard Cite

In conclusion, the resource (food)-feedback model of bioturbation, Eq. 3, not only predicts the existence of a finitedepth bioturbated zone in sediments, but substitution of currently available parameter values into this model indicates that the mean mixing depth should be a worldwide constant of 9.7 cm, independent of water depth or sedimentation rate. This result agrees with the data compilations in Fig. 1 and in Boudreau (1994). If this paper had dealt with a problem of physics or chemistry where predictive theories are the norm, then the model and calculations presented here would be valuable, but not overly remarkable; however, the natural sciences, and particularly geochemistry and ecology, are singularly lacking in successful quantitative theories. The complexities of the phenomena studied in these fields is thought to preclude simple and predictive explanations. This paper also illustrates the fallacy of such a belief.

show abstract

Flow-injection analysis of trace elements by use of catalytic reactions

Cited by 41 publications

References 83 publications

Development of Novel Redox Systems by Use of Ligand Effect and Its Application to Potentiometry

Development of Novel Redox Systems by Use of Ligand Effect and Its Application to Potentiometry

Flow-Injection Determination of Copper(II) Based on Its Catalytic Effect on the Oxidative Coupling of 3-Methyl-2-benzothiazolinone Hydrazone with N-Ethyl-N-(2-hydroxy-3-sulfopropyl)-3,5-dimethoxyaniline in a Micellar Medium

Determination of dissolved vanadium in natural waters by flow injection analysis with colorimetric detection

Contact Info

Product

Resources

About