Flow injection method for the determination of silver concentration in drinking water for spacecrafts

Bruzzoniti, Maria Concetta; Korte, Dorota; Franko, Mladen; Sarzanini, Corrado

doi:10.1016/j.aca.2010.03.016

Cited by 18 publications

(10 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A reaction between silver nitrate and sodium borohydride in water solution could be described by following chemical reaction 15 …”

Section: Synthesis Of Silver Nanoparticlesmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of Sorbitan Ester Stabilized Uniform Spherical Silver Nanoparticles

Shukla¹,

Nandi²,

Palsingh³

2016

Orient. J. Chem

View full text Add to dashboard Cite

Controllable synthesis of uniform spherical silver nanoparticles was investigated by carrying out a chemical reduction reaction in a micro emulsion, formed under high shear mixing of aqueous silver nitrate solution and 2-ethyl hexanol as organic phase. Sodium borohydride was used as reducing agent and sorbitan monooleate (span-80) as stabilizer. Further, a study has been performed to observe the effect of silver nitrate concentration, reducing agent concentration, amount of surfactant and organic phase on the size and shape of silver nanoparticles. Transmission electron microscopy (TEM) and dynamic light scattering (DLS) techniques were used for elucidating the shape, size and size distribution of the synthesized silver nanoparticles. Crystal structure of silver nanoparticles thus prepared has been studied by X-ray diffraction analysis (XRD). Uniform silver nanoparticles of average diameter 15-20 nm with high purity and well crystalline nature were obtained under optimized set of conditions. The results of synthesis of these nanoparticles in present study were excellent and may also be used at larger scale.

show abstract

“…A reaction between silver nitrate and sodium borohydride in water solution could be described by following chemical reaction 15 …”

Section: Synthesis Of Silver Nanoparticlesmentioning

confidence: 99%

“…Taking into consideration reaction (1) proposed by Bruzzoniti et al 15 , one product (diborane) is absent in reaction (5).…”

mentioning

confidence: 99%

Synthesis of Sorbitan Ester Stabilized Uniform Spherical Silver Nanoparticles

Shukla¹,

Nandi²,

Palsingh³

2016

Orient. J. Chem

View full text Add to dashboard Cite

show abstract

“…Thus, 0.6 mM sodium borohydrate of pH 12.5 and 0.3 mL · min −1 flow rate of the carrier and the reductant were selected for further work. Since no significant shifts in the position of the absorbance maximum were observed, it was concluded that the size of generated silver colloid particles [16] does not change much within the investigated experimental conditions (pH, NaBH 4 concentration) and no changes in the absorption spectrum are expected if the reaction conditions for the generation of colloidal silver are kept constant. Therefore, the krypton 407 nm emission line was chosen for excitation among the argon (333.6 nm to 514.5 nm) and krypton laser lines (337.5 nm to 752.5 nm) from the laser sources available in the laboratory.…”

Section: Experimental Setup Optimizationmentioning

confidence: 92%

“…4). No significant [16], while lower flow rates resulted in higher baseline noise due to instable operation of HPLC pumps at flow rates below 0.3 mL · min −1 . Thus, 0.6 mM sodium borohydrate of pH 12.5 and 0.3 mL · min −1 flow rate of the carrier and the reductant were selected for further work.…”

Section: Experimental Setup Optimizationmentioning

confidence: 96%

“…Since the thermal lens effect is directly proportional to the power of the excitation beam, the TLS technique offers extremely high sensitivities which surpass those achievable by transmission mode spectrometric techniques by two orders of magnitude or more [15]. Theoretically, silver ions or colloids at concentrations as low as 0.05 µg · L −1 could be detected taking into account the limiting absorbance of 10 −7 and the molar extinction coefficients of silver nanoparticles generated by BH − 4 in water [16].…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Thermal Lens Spectrometric Determination of Colloidal and Ionic Silver in Water

et al. 2010

Self Cite

View full text Add to dashboard Cite

Collinear dual beam thermal lens spectrometric (TLS) detection, combined with flow injection analysis (FIA), was developed and applied to determine simultaneously concentrations of ionic and colloidal silver in the Russian drinking water supplies of the International Space Station (ISS). The newly developed method is based on on-line generation of silver colloids by sodium borohydride (NaBH 4 ). The generated silver nanoparticles exhibit an absorption maximum close to 400 nm, which enables their excitation with a 407 nm line of a Kr laser offering a very sensitive TLS detection scheme with impressive limits of detection (LOD) of 1.5 µg · L −1 . Ionic and colloidal silver present initially in the sample can be discriminated by performing the measurements with and without NaBH 4 .

show abstract