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Wyszukujesz frazę "Lokhande, R. S." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Solvent extraction and spectrophotometric determination of Uranium (VI) using 2,2′-[1,2-phenylenebis(nitrilomethylidene)]bisphenol (BSOPD) as an analytical reagent
    Autorzy:
    Sebastian, S.
    Singare, P.U.
    Lokhande, R.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/412353.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Uranium (VI)
    solvent extraction-spectrophotometric determination
    monazite sand
    2,2’-[1,2-phenylenebis(nitrilomethylidene)]bisphenol (BSOPD)
    Opis:
    2,2'-[1,2-phenylenebis(nitrilomethylidene)]bisphenol (BSOPD) is synthesized in the laboratory and characterized by NMR, IR and elemental analysis for its purity. This reagent forms a yellow complex with U(VI) which can be quantitatively extracted into chloroform at pH 10. This complex in chloroform shows an intense absorption peak at 413.0 nm. It is observed that Beer’s law is obeyed in the range of 2.0-10.0 ppm of metal solution. It gives a linear and reproducible graph under appropriate conditions, the complex having a molar absorptivity of 3.69 x 104 L mol-1·cm-1. Sandell’s sensitivity calculated was found to be 4.4 x 10-3 μg·cm-2. Nature of the extracted complex, determined by Job’s continuous variation method, Slope ratio method and Mole ratio method shows that the composition of U(VI) : BSOPD complex is 1:4. Interference by various ions is studied and masking agents used where required. The proposed method has been applied for the determination of U (VI) in monazite sand and synthetic samples. The results of the analysis are found to be comparable with those obtained by standard method.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 7, 2; 125-133
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selective separation of cerium from lanthanides by extractive photometry using HDBE as novel reagent
    Autorzy:
    Bambardekar, Y.
    Singare, P.U.
    Lokhande, R.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/411631.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    lanthanides
    HDBE
    xylene
    extracted complex
    Beer’s law
    molar absorptivity
    Sandell sensitivity
    Opis:
    Striking similarities in properties of lanthanides make their separation a difficult task. Development of highly selective analytical reagent hexane-2,5-dione-bis(ethylenediamine) HDBE that forms brown coloured complex with Ce(IV) which is quantitatively extracted into xylene at pH 6.4. Transfer of extracted complex to organic phase is very fast (<1min.). Optimum concentration of reagent required for complexation and full colour development is very low (0.8 cm3 of 0.1 % HDBE). Absorption maximum exhibited at 518 nm. Beer’s law is obeyed in the detectable range 0.3-4.0 ppm. The molar absorptivity and Sandell’s sensitivity values are 0.421•104 dm3• mol-1•cm-1 and 0.017 μg•cm-2 respectively. The present method is time honoured, permits selective separation of cerium from associated lanthanones using HDBE as a novel complexing agent.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 7, 2; 144-150
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of method for extractive spectrophotometric determination of Fe(III) with 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an analytical reagent
    Autorzy:
    Ratnamala, P. S.
    Lokhande, R. S.
    Utkarsha, M. Ch.
    Powiązania:
    https://bibliotekanauki.pl/articles/411571.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Iron Spectrophotometric determination
    ethyl acetate
    2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone
    Opis:
    A spectrophotometric method has been developed for the determination of Fe(III) using 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an extractive reagent. The reagent forms a coloured complex, which has been quantitatively extracted into ethyl acetate at pH 6. The method obeys Beer’s law over arrange from 1 to 7 ppm. The Molar absorptivity and Sandell’s sensitivity were 0.31 × 104 L mol-1cm-1 and 0.13 μg cm-2 respectively. The proposed method is very sensitive and selective. The method has been successfully applied to synthetic and commercial samples.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 9, 1; 7-12
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of method for extractive spectrophotometric determination of Cu(II) with 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an analytical reagent
    Autorzy:
    Ratnamala, P. S.
    Lokhande, R. S.
    Utkarsha, M. Ch.
    Powiązania:
    https://bibliotekanauki.pl/articles/412128.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Copper Spectrophotometric determination
    n-Butanol
    2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazine
    Opis:
    A spectrophotometric method has been developed for the determination of Cu(II) using 2-Hydroxy-1-Naphthalene carboxaldehyde phenyl hydrazone as an extractive reagent. The reagent forms a coloured complex, which has been quantitatively extracted into n-butanol at pH 9.2. The method obeys Beer’s law over arrange from 1 to 10 ppm. The Molar absorptivity and Sandell’s sensitivity were 0.97 × 104 L mol-1cm-1 and 0.26 μg•cm-2 respectively. The proposed method is very sensitive and selective. The method has been successfully applied to synthetic and commercial samples.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 9, 1; 1-6
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Appraisal of Noise Level Dissemination Surrounding Mining and Industrial Areas of Keonjhar, Odisha: a Comprehensive Approach Using Noise Mapping
    Autorzy:
    Lokhande, S. K.
    Dhawale, S. A.
    Pathak, S. S.
    Gautam, R.
    Jain, M. C.
    Bodhe, G. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/176752.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    noise mapping
    noise prediction
    predictor LimA
    mining
    GIS
    Opis:
    Noise mapping is a well-established practice among the European nations, and it has been follow for almost two decades. Recently, as per guidelines of the Directorate General of Mines Safety (DGMS), India, noise mapping has been made mandatory in the mining expanses. This study is an effort to map the noise levels in nearby areas of mines in the northern Keonjhar district. The motive of this study is to quantify the existing A-weighted time-average sound level (LAeq, T) in the study area to probe its effects on the human dwellings and noise sensitive areas with the probability of future development of the mines, roads, and industrial and commercial zone. The LAeq, T was measured at 39 identified locations, including industrial, commercial, residential, and sensitive zones, 15 open cast mines, 3 major highways, and 3 haulage roads. With the utilisation of Predictor LimA Software and other GIS tools, the worked out data is mapped and noise contours are developed for the visualisation and identification of the extent and distribution of sound levels across the study area. This investigation discloses that the present noise level at 60% of the locations in silence and residential zone exposed to significantly high noise levels surpasses the prescribed limit of Central Pollution Control Board (CPCB), India. The observed day and night time LAeq, T level of both zones ranged between 43.2–62.2 dB(A) and 30.5–53.4 dB(A), respectively, whereas, the average Ldn values vary between 32.7 and 51.2 dB(A). The extensive mobility of heavy vehicles adjoining the sensitive areas and a nearby plethora of open cast mines is the leading cause of exceeded noise levels. The study divulges that the delicate establishments like schools and hospitals are susceptible to high noise levels throughout the day and night. A correlation between observed and software predicted values gives R2 of 0.605 for Ld, 0.217 for Ln, and 0.524 for Ldn. Finally, the mitigation measure is proposed and demonstrated using a contour map showing a significant reduction in the noise levels by 0–5.3 dB(A).
    Źródło:
    Archives of Acoustics; 2017, 42, 3; 423-432
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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