New silver selective electrode fabricated from benzothiazole calix[4]arene: Speciation analysis of silver nanoparticles

Ngeontae, Wittaya; Janrungroatsakul, Wanwisa; Morakot, Neramit; Aeungmaitrepirom, Wanlapa; Tuntulani, Thawatchai

doi:10.1016/j.snb.2008.05.010

Cited by 46 publications

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“…Then, the purified AgNPs were washed three times with DI water and adjusted to the same volume before dilution. The percentage purity of the AgNPs was measured from free Ag ion concentration in the original AgNPs solution (10,000 ppm) using the macro-and microelectrode [15]. The results showed that the Ag ion concentration was contented at 3.77 ± 0.2 and 3.61 ± 0.2 ppm with the macro-and microelectrode, respectively.…”

Section: Preparation and Characterization Of Agnpsmentioning

confidence: 99%

An Evaluation of Acute Toxicity of Colloidal Silver Nanoparticles

et al. 2011

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ABSTRACT. Tests for acute oral toxicity, eye irritation, corrosion and dermal toxicity of colloidal silver nanoparticles (AgNPs) were conducted in laboratory animals following OECD guidelines. Oral administration of AgNPs at a limited dose of 5,000 mg/kg produced neither mortality nor acute toxic signs throughout the observation period. Percentage of body weight gain of the mice showed no significant difference between control and treatment groups. In the hematological analysis, there was no significant difference between mice treated with AgNPs and controls. Blood chemistry analysis also showed no differences in any of the parameter examined. There was neither any gross lesion nor histopathological change observed in various organs. The results indicated that the LD 50 of colloidal AgNPs is greater than 5,000 mg/kg body weight. In acute eye irritation and corrosion study, no mortality and toxic signs were observed when various doses of colloidal AgNPs were instilled in guinea pig eyes during 72 hr observation period. However, the instillation of AgNPs at 5,000 ppm produced transient eye irritation during early 24 hr observation time. No any gross abnormality was noted in the skins of the guinea pigs exposed to various doses of colloidal AgNPs. In addition, no significant AgNPs exposure relating to dermal tissue changes was observed microscopically. In summary, these findings of all toxicity tests in this study suggest that colloidal AgNPs could be relatively safe when administered to oral, eye and skin of the animal models for short periods of time.KEY WORDS: acute toxicity, colloidal silver nanoparticles, dermal, eye, oral.J. Vet. Med. Sci. 73(11): 1417-1423, 2011 Engineered nanoparticles (NP) are defined as materials produced within the nanoscale range of 1-100 nm in length or diameter that exhibit unique novel properties of the structural integrity as well as physical and chemical properties [26]. Over the past few decades, nanomaterials have had a great impact and gained enormous attention in science, technology and business because of their potential for achieving specific processes and selectivity. Although the applications and benefits of these engineered nanomaterials are extensively and currently being widely used in modern technology and many commercial and medical sectors, there is still limited information concerning human health and environmental impacts. Several studies expected that nanoparticles could lead to unexpected health or environmental hazards because of their unique properties such as extremely high surface area and increased reactivity [7].Silver nanoparticles (AgNPs), one of the most commonly used metal-nanoparticles, have been known to have a wide range of applications including solar energy absorption coatings, chemical catalysts and especially antimicrobial agents. AgNPs have potentials for inhibitory and bactericidal effects as well as retarding the growth of mold, harmful spores and germs [5]. Compared to bulk silver metal, AgNPs are expected to have higher antimicrobial activity...

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Section: Preparation and Characterization Of Agnpsmentioning

confidence: 99%

An Evaluation of Acute Toxicity of Colloidal Silver Nanoparticles

et al. 2011

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“…Good selectivity results from a stronger complex between the ionophore and detecting ion, rather than a weaker complex of the ionophore and interfering ions. 19 It is well known that sulfurand nitrogen-containing ligands prefer to bind with heavy metal ions such as Ag + .…”

Section: Introductionmentioning

confidence: 99%

Novel Silver(I) Ion Selective PVC Membrane Electrode Based on the Schiff Base (N²E,N^2'E)-N²,N^2'-Bis(Thiophen-2-ylmethylene)-1,1'-Binaphthyl-2,2'-Diamine

Jeong¹,

Ahmed²,

Jeong³

et al. 2011

Bulletin of the Korean Chemical Society

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“…Benzothiazole calix [4]arene was synthesized as described in earlier literature. 18 Supplies of 1,1-Dichlorodimethyl ether for synthesis was purchased from Merck and Tin(IV) chloride was purchased from Aldrich. Commercial grade solvents such as dichloromethane, ethyl acetate and toluene were distilled and stored over 4 Å molecular sieves.…”

Section: Reagentsmentioning

confidence: 99%

“…selective electrode. [18][19][20] Thus, the sorbent modified with benzothiazole calix [4]arene was prepared and the sorption properties toward silver(I) ion from aqueous solution was studied. Then, the online preconcentration coupled to FAAS was used for determination of the trace level of silver ions in water samples.…”

Section: Introductionmentioning

confidence: 99%

Preconcentration and Determination of Trace Silver Ion Using Benzothiazole Calix[4]arene Modified Silica by Flow Injection Flame Atomic Absorption Spectrometry

et al. 2014

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New silver selective electrode fabricated from benzothiazole calix[4]arene: Speciation analysis of silver nanoparticles

Cited by 46 publications

References 31 publications

An Evaluation of Acute Toxicity of Colloidal Silver Nanoparticles

An Evaluation of Acute Toxicity of Colloidal Silver Nanoparticles

Novel Silver(I) Ion Selective PVC Membrane Electrode Based on the Schiff Base (N²E,N^2'E)-N²,N^2'-Bis(Thiophen-2-ylmethylene)-1,1'-Binaphthyl-2,2'-Diamine

Preconcentration and Determination of Trace Silver Ion Using Benzothiazole Calix[4]arene Modified Silica by Flow Injection Flame Atomic Absorption Spectrometry

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New silver selective electrode fabricated from benzothiazole calix[4]arene: Speciation analysis of silver nanoparticles

Cited by 46 publications

References 31 publications

An Evaluation of Acute Toxicity of Colloidal Silver Nanoparticles

An Evaluation of Acute Toxicity of Colloidal Silver Nanoparticles

Novel Silver(I) Ion Selective PVC Membrane Electrode Based on the Schiff Base (N2E,N2'E)-N2,N2'-Bis(Thiophen-2-ylmethylene)-1,1'-Binaphthyl-2,2'-Diamine

Preconcentration and Determination of Trace Silver Ion Using Benzothiazole Calix[4]arene Modified Silica by Flow Injection Flame Atomic Absorption Spectrometry

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Novel Silver(I) Ion Selective PVC Membrane Electrode Based on the Schiff Base (N²E,N^2'E)-N²,N^2'-Bis(Thiophen-2-ylmethylene)-1,1'-Binaphthyl-2,2'-Diamine