ICP AES determination of platinum group elements and gold in collective extract and strip product solution in analysis of geological samples

Torgov, V. G.; Корда, Т. М.; Демидова, М. Г.; Gus’kova, E. A.; Bukhbinder, G.L.

doi:10.1039/b912849m

Cited by 20 publications

(13 citation statements)

References 33 publications

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“…The UV‐absorbance peak located at 227 nm was used to quantify the carboplatin concentration . The carboplatin loading level was also determined by a Perkin Elmer Optima 2000 inductively coupled plasma atomic emission spectroscopy (ICP‐AES) at the wavelength of 265.945 nm as detailed in the Supporting Information …”

Section: Experiments Sectionmentioning

confidence: 99%

Carboplatin‐Complexed and cRGD‐Conjugated Unimolecular Nanoparticles for Targeted Ovarian Cancer Therapy

Wang

Chen

et al. 2016

Macromolecular Bioscience

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Platinum-based chemotherapy has been widely used to treat cancers including ovarian cancer; however, it suffers from dose-limiting toxicity. Judiciously designed drug nanocarriers can enhance the anticancer efficacy of platinum-based chemotherapy while reducing its systemic toxicity. Herein the authors report a stable and water-soluble unimolecular nanoparticle constructed from a hydrophilic multi-arm star block copolymer poly(amidoamine)-b-poly(aspartic acid)-b-poly(ethylene glycol) (PAMAM-PAsp-PEG) conjugated with both cRGD (cyclo(Arg-Gly-Asp-D-Phe-Cys) peptide and cyanine5 (Cy5) fluorescent dye as a platinum-based drug nanocarrier for targeted ovarian cancer therapy. Carboplatin is complexed to the poly(aspartic acid) inner shell via pH-responsive ion–dipole interactions between carboplatin and the carboxylate groups of poly(aspartic acid). Based on flow cytometry and confocal laser scanning microscopy analyses, cRGD-conjugated unimolecular nanoparticles exhibit much higher cellular uptake by ovarian cancer cells overexpressing αvβ3 integrin than nontargeted (i.e., cRGD-lacking) ones. Carboplatin-complexed cRGD-conjugated nanoparticles also exhibit higher cytotoxicity than nontargeted nanoparticles as well as free carboplatin, while empty unimolecular nanoparticles show no cytotoxicity. These results indicate that stable unimolecular nanoparticles made of individual hydrophilic multi-arm star block copolymer molecules conjugate with tumor-targeting ligands and dyes (i.e., PAMAM-PAsp-PEG-cRGD/Cy5) are promising nanocarriers for platinum-based anticancer drugs for targeted cancer therapy.

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Section: Experiments Sectionmentioning

confidence: 99%

Carboplatin‐Complexed and cRGD‐Conjugated Unimolecular Nanoparticles for Targeted Ovarian Cancer Therapy

Wang

Chen

et al. 2016

Macromolecular Bioscience

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“…Considering gold application in medical treatment, its determination in biological samples and drugs is also necessary. Many analytical methods were used in the course of gold determination such as: spectrophotometry 2, atomic absorption spectrometry 3, inductively coupled plasma atomic emission spectrometry 4, inductively coupled plasma mass spectrometry 5,6, and neutron activation analysis 7. Because the above methods require sophisticated and expensive instruments electrochemical methods are a competitive alternative as concerns heavy metals ions determination on trace and ultratrace levels.…”

Section: Introductionmentioning

confidence: 99%

Double Deposition and Stripping Steps for Trace Determination of Au(III) Using Anodic Stripping Voltammetry

2015

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A new way of decreasing the detection limit ‐ double deposition and stripping steps was proposed to determine trace amounts of gold(III) by anodic stripping voltammetry. Two carbon composite electrodes that differed drastically in their surface areas were used for the measurements. The calibration graph was linear from 1×10−9 to 1×10−8 mol L−1 following deposition time of 300 s at the first and the second electrode. The detection limit was found to be 2.3×10−10 and 1.4×10−11 mol L−1 for deposition time 600 and 2400 s, respectively. It is the lowest detection limit obtained so far for gold(III) determination in stripping voltammetry.

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“…The above procedures can be used in combination with the subsequent deter mination of platinum by neutron activation analysis [14,15], chromatography [6,16,17], and various spectroscopic techniques-atomic absorption spec trometry, inductively coupled plasma techniques, etc. [3,4,[18][19][20]. Spectrophotometry also plays an important role.…”

mentioning

confidence: 99%

Extraction of platinum with Astrafloxin FF from aqueous-organic solutions: Separative extraction-spectrophotometric determination of platinum(II) and platinum(IV) species

et al. 2012

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The optimum conditions of the extraction of the ion associates of platinum with the thiocyanate ions and the polymethine basic dye Astrafloxin FF by aromatic hydrocarbons and acetic acid esters from aqueous and aqueous organic solutions were studied. The introduction of water soluble donor active sol vents (hexamethylphosphoric triamide, N,N diethylacetamide, N,N dimethylformamide, and N,N diethyl formamide) leads to a considerable increase in the extraction of the ion associates of platinum and the simul taneous suppression of the extraction of the simple dye salt. The molar absorption coefficients of the extracts of ion associates are as high as (8.1-13.3) × 10 4 . 84-96% platinum is extracted in the form of ion associates by a single extraction. The conversion of platinum into ion associates makes it possible to separate platinum from many elements, including Cu, Cd, Ni, Co, Cr, Pb, In, Ag, Pd, Ir, Rh, and Ru, by extraction. In this case, platinum(II) is extracted in the form of ion associates under standard conditions, whereas platinum(IV) is extracted only after the preliminary thermal treatment of the test sample. A new procedure was developed for the extraction-spectrophotometric determination of the trace amounts of platinum(II) and plati num(IV), in particular, in their mixtures.

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ICP AES determination of platinum group elements and gold in collective extract and strip product solution in analysis of geological samples

Cited by 20 publications

References 33 publications

Carboplatin‐Complexed and cRGD‐Conjugated Unimolecular Nanoparticles for Targeted Ovarian Cancer Therapy

Carboplatin‐Complexed and cRGD‐Conjugated Unimolecular Nanoparticles for Targeted Ovarian Cancer Therapy

Double Deposition and Stripping Steps for Trace Determination of Au(III) Using Anodic Stripping Voltammetry

Extraction of platinum with Astrafloxin FF from aqueous-organic solutions: Separative extraction-spectrophotometric determination of platinum(II) and platinum(IV) species

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