Chronological changes in toxicity of and heavy metals in sediments of two Chesapeake Bay tributaries

Karuppiah, Makesh; Gupta, Gian

doi:10.1016/s0304-3894(97)00142-8

Cited by 14 publications

(18 citation statements)

References 16 publications

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“…thiacalix [4]arene and 3-methoxy benzyl bromide were purchased from Aldrich. High molecular weight poly(vinyl chloride) (PVC), dimethyl phthalate (DMP), diisobutyl phthalate (DBP), dioctyl phthalate (DOP), tris (ethyhexyl) phosphate (TEP), bis-(2-ethylhexyl sebacate) (BEHS), sodium tetraphenyl borate and (NaTPB), tetrahydrofuran (THF) were purchased from Merck.…”

Section: Methodsmentioning

confidence: 99%

“…In present study we have tested a new ionic carrier based on thiacalix [4]arene for the selective determination of cadmium in biological and environmental samples. The proposed electrode work satisfactorily in the concentration range of has detection limit of 1.0x10 -8 M for Cd 2+ in a concentration range of 1.8x10 -8 -1.0x10 -1 and response time of 5 s.…”

Section: Research Articlementioning

confidence: 99%

“…The ionophore 5,11,17,23-tetra-tert-butyl-25,27-bis-[(3′-methoxy phenyl)methoxy]-26,28-dihydroxy-2,8,14,20-tetrathiacalix [4]arene (Figure 1) was prepared by the reported methods 17 .…”

Section: Synthesis Of Ionophorementioning

confidence: 99%

“…To a suspension of p-tert-butyltetrathiacalix [4]arene (1.20 mmol in 10 mL THF) 3-methoxybenzyl bromide (1.25 mmol in 10 mL THF) was added and refluxed for two days. The ligand was obtained as pale yellow crystals.…”

Section: Synthesis Of Ionophorementioning

confidence: 99%

“…Cadmium is used for many industrial and agricultural purposes like metal plating, cadmium-nickel batteries, mining, pigments, stabilizers, alloys and phosphate fertilizers, where it comes into the environment. It is an environmental hazard and one of the most toxic substances which may cause many types of dieases 3,4 . The determination of metal ions especially the toxic ones like cadmium is a subject of great importance and increasingly demanded by the society.…”

Section: Introductionmentioning

confidence: 99%

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Thiacalix[4]arene Derivative as Potential Carrier for Cadmium Sensing using PVC Membrane Electrode

Kumar¹,

Siddhu²

2013

Chem Sci Trans

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Abstract:The main aim of this work is to improve the lower detection limit of cadmium selective polymeric membrane. The sensor was fabricated by using thiacalixarene derivative 5,11,17,23-tetratert-butyl-25,27-bis-[(3′-methoxy phenyl)methoxy]-26, 28-dihydroxy-2,8,14,20-tetrathiacalix [4]arene as ionophore. The membrane with composition of ionophore: PVC: DMP: NaTPB of 3.5% : 33% : 1.0% : 62.5% (w/v) has a standard detection limit of 1.0x10 -8 M and lowest possible detection limit of 6.2x10 -9 M. The electrode exhibits Nernstian response with slope 35.3±1 mV decade -1 of activity in linear concentration range of 4.2x10 -8 to 1.0x10 -1 M for Cd 2+ ion, performs satisfactorily over wide pH range (1.5-7.0), with a fast response time (5s). The selectivity coefficients determined by using fixed interference method (FIM) indicate high selectivity for Cd2+ as compared to other tested cations. The practicable utility of electrode has been demonstrated in the titration of Cd 2+ with standard EDTA solution. The proposed electrode was successfully used for the determination of Cd 2+ in different biological and environmental samples.

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Section: Methodsmentioning

confidence: 99%

Section: Research Articlementioning

confidence: 99%

“…The ionophore 5,11,17,23-tetra-tert-butyl-25,27-bis-[(3′-methoxy phenyl)methoxy]-26,28-dihydroxy-2,8,14,20-tetrathiacalix [4]arene (Figure 1) was prepared by the reported methods 17 .…”

Section: Synthesis Of Ionophorementioning

confidence: 99%

Section: Synthesis Of Ionophorementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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