DPS Rathore - Academia.edu (original) (raw)
Papers by DPS Rathore
Chemical Laboratory, Atomic Minerals Division. Department of Atomic Energy, 5-Jai Jawan Colony, T... more Chemical Laboratory, Atomic Minerals Division. Department of Atomic Energy, 5-Jai Jawan Colony, Tonk Road. Jaipur-302 015 <em>Manuscript received 18 May 1992, revised 30 September 1992, accepted 19 November 1992</em> Identification of Vanadium by using a Schiff Base derived from 2-Furfuraldehyde and \(\rho\)-Aminophenylmercaptoacetic Acid
Exploration and Research for Atomic Minerals
ABSTRACT
ABSTRACT In the present work, Inductively Coupled Plasma Optical Emission Spectrometer ( ICP-OES)... more ABSTRACT In the present work, Inductively Coupled Plasma Optical Emission Spectrometer ( ICP-OES) has been used for the direct, rapid and accurate measurement of total concentration ofuranium in borehole core samples. Under standard operating conditions of the instrument, the spectral line at 409.014 nm shows better signal-to-background intensity ratio and is free from spectral interferences by matrix elements present in silicate borehole core and ore samples with a detection limit of 0.025 μg ml-1 U3O8. Under the optimized conditions, the reproducibilityof the proposed method was checked by performing nine replicate determinations of 0.597,0.140, 0.062 and 0.005 %U3O8 over a period of nine consecutive days. The relative standard deviation (RSD) of the method was 0.79, 0.80, 2.04 and 8.10 % respectively. The proposed ICP-OES method is suitable for the determination of more than 0.001 %U3O8 in silicate rock samples.The method has been applied for the determination of uranium in international standard samples, SY-2, SY-3 and uranium ore, BL-2a, IAEA-low grade uranium ores and borehole core samples. “t”-test for paired data has been applied for comparing the results obtained in the same borehole sample by ICP-OES method with those obtained by using ‘differential technique in laser-induced fluorimetry method’(DT-LIF) as a reference measurement procedure. The calculated value for “t” is 0.52, which is less than the tabulated value of “t” for 20 borehole sample results (t=2.09 at 95% confidence level for n=20 results). This shows that the results of the measurements carried out without any chemical preparation or extraction by both the ICP-OES and ‘differential technique in laser-induced fluorimetry’ are not significantly different. The results of uranium content compare favorably with those obtained by using conventional fluorimetry.
J. Anal. At. Spectrom., 2014
A differential inductively coupled plasma emission spectrometry as a relative reference measureme... more A differential inductively coupled plasma emission spectrometry as a relative reference measurement procedure for the determination of total mass fraction of uranium in mineralized rocks, ores and similar matrices is presented.
Abstract A novel procedure for the extraction of uranium has been described. UO 2 2+ forms a 1: 3... more Abstract A novel procedure for the extraction of uranium has been described. UO 2 2+ forms a 1: 3 anionic complex with 2, 3-dihydroxynaphthalene in the pH range, 4–12. This anionic complex is best extracted into ethyl acetate at pH 11–12 under the influence of a counter ...
The Analyst, 2000
Page 1. Metal ion enrichment with Amberlite XAD-2 functionalized with Tiron: analytical applicati... more Page 1. Metal ion enrichment with Amberlite XAD-2 functionalized with Tiron: analytical applications Manjeet Kumar,a DPS Rathorea and Ajai K. Singh*b a Chemistry Group, Atomic Minerals Directorate for Exploration and Research ...
The Analyst, 1995
Amberlite XAD-2 has been functionalized by coupling it through an NN group with salicylic acid.... more Amberlite XAD-2 has been functionalized by coupling it through an NN group with salicylic acid. The resulting chelating resin has been characterized by using elemental analyses, thermogravimetric analysis (TGA) and infrared (IR) spectra. It has been used for preconcentrating ...
Accreditation and Quality Assurance, 2011
The metrological principle of 'differential technique in laser-induced fluorimetry' analysis is d... more The metrological principle of 'differential technique in laser-induced fluorimetry' analysis is discussed and recommended as a reference measurement procedure for determination of total uranium content in ores and similar matrices. The estimated relative expanded uncertainty values obtained for uranium content in standard IAEA samples are, S 1, 0.04 g/kg, S 2, 0.06 g/kg, S 3, 0.04 g/kg, and for S 4, 0.10 g/kg, respectively. These low uncertainty values obtained for uranium show high metrological quality of differential technique. This reference measurement procedure guarantees the quality of an analytical result (accuracy, high precision, reliability, comparability, and traceability). Laser-induced fluorimetry will be useful for the analysis of uranium in ores, certification of reference materials, borehole core assay, and other diverse applications in nuclear fuel cycle. Differential technique in spectrophotometry/laser fluorimetry has inherent high metrological quality. In principle, laser-induced fluorimetry is an ideal technique for the very accurate determination of uranium by the use of appropriate fluorescence-enhancing reagents and methodology depending upon the concentration of uranium and sample matrices.
Analytica Chimica Acta, 2001
A simple, rapid, cost-effective, accurate and precise differential laser-induced fluorimetric met... more A simple, rapid, cost-effective, accurate and precise differential laser-induced fluorimetric method for the direct determination of uranium in mineralised rocks at the percentage level is presented, based on the comparison of the fluorescence of the standard with a sample of similar but unknown concentration on the same sample weight basis, by the use of H 3 PO 4-NH 4 H 2 PO 4 as a fluorescence enhancing reagent. The relative standard deviation of the method was 0.3-0.5% (n = 9) for 0.04 and 3.4% U 3 O 8. The proposed technique is suitable for the determination of uranium in samples containing >0.01% uranium. The method has been evaluated using standards, SY-2, SY-3, low grade uranium ore-IAEA reference samples and core samples of diverse matrices. The results are in good agreement with the published data and those obtained by conventional fluorimetry and other methods and are of comparable precision to those obtained by titrimetric assay.
Analytica Chimica Acta, 1993
Chemical Laboratory, Atomic Minerals Division. Department of Atomic Energy, 5-Jai Jawan Colony, T... more Chemical Laboratory, Atomic Minerals Division. Department of Atomic Energy, 5-Jai Jawan Colony, Tonk Road. Jaipur-302 015 <em>Manuscript received 18 May 1992, revised 30 September 1992, accepted 19 November 1992</em> Identification of Vanadium by using a Schiff Base derived from 2-Furfuraldehyde and \(\rho\)-Aminophenylmercaptoacetic Acid
Exploration and Research for Atomic Minerals
ABSTRACT
ABSTRACT In the present work, Inductively Coupled Plasma Optical Emission Spectrometer ( ICP-OES)... more ABSTRACT In the present work, Inductively Coupled Plasma Optical Emission Spectrometer ( ICP-OES) has been used for the direct, rapid and accurate measurement of total concentration ofuranium in borehole core samples. Under standard operating conditions of the instrument, the spectral line at 409.014 nm shows better signal-to-background intensity ratio and is free from spectral interferences by matrix elements present in silicate borehole core and ore samples with a detection limit of 0.025 μg ml-1 U3O8. Under the optimized conditions, the reproducibilityof the proposed method was checked by performing nine replicate determinations of 0.597,0.140, 0.062 and 0.005 %U3O8 over a period of nine consecutive days. The relative standard deviation (RSD) of the method was 0.79, 0.80, 2.04 and 8.10 % respectively. The proposed ICP-OES method is suitable for the determination of more than 0.001 %U3O8 in silicate rock samples.The method has been applied for the determination of uranium in international standard samples, SY-2, SY-3 and uranium ore, BL-2a, IAEA-low grade uranium ores and borehole core samples. “t”-test for paired data has been applied for comparing the results obtained in the same borehole sample by ICP-OES method with those obtained by using ‘differential technique in laser-induced fluorimetry method’(DT-LIF) as a reference measurement procedure. The calculated value for “t” is 0.52, which is less than the tabulated value of “t” for 20 borehole sample results (t=2.09 at 95% confidence level for n=20 results). This shows that the results of the measurements carried out without any chemical preparation or extraction by both the ICP-OES and ‘differential technique in laser-induced fluorimetry’ are not significantly different. The results of uranium content compare favorably with those obtained by using conventional fluorimetry.
J. Anal. At. Spectrom., 2014
A differential inductively coupled plasma emission spectrometry as a relative reference measureme... more A differential inductively coupled plasma emission spectrometry as a relative reference measurement procedure for the determination of total mass fraction of uranium in mineralized rocks, ores and similar matrices is presented.
Abstract A novel procedure for the extraction of uranium has been described. UO 2 2+ forms a 1: 3... more Abstract A novel procedure for the extraction of uranium has been described. UO 2 2+ forms a 1: 3 anionic complex with 2, 3-dihydroxynaphthalene in the pH range, 4–12. This anionic complex is best extracted into ethyl acetate at pH 11–12 under the influence of a counter ...
The Analyst, 2000
Page 1. Metal ion enrichment with Amberlite XAD-2 functionalized with Tiron: analytical applicati... more Page 1. Metal ion enrichment with Amberlite XAD-2 functionalized with Tiron: analytical applications Manjeet Kumar,a DPS Rathorea and Ajai K. Singh*b a Chemistry Group, Atomic Minerals Directorate for Exploration and Research ...
The Analyst, 1995
Amberlite XAD-2 has been functionalized by coupling it through an NN group with salicylic acid.... more Amberlite XAD-2 has been functionalized by coupling it through an NN group with salicylic acid. The resulting chelating resin has been characterized by using elemental analyses, thermogravimetric analysis (TGA) and infrared (IR) spectra. It has been used for preconcentrating ...
Accreditation and Quality Assurance, 2011
The metrological principle of 'differential technique in laser-induced fluorimetry' analysis is d... more The metrological principle of 'differential technique in laser-induced fluorimetry' analysis is discussed and recommended as a reference measurement procedure for determination of total uranium content in ores and similar matrices. The estimated relative expanded uncertainty values obtained for uranium content in standard IAEA samples are, S 1, 0.04 g/kg, S 2, 0.06 g/kg, S 3, 0.04 g/kg, and for S 4, 0.10 g/kg, respectively. These low uncertainty values obtained for uranium show high metrological quality of differential technique. This reference measurement procedure guarantees the quality of an analytical result (accuracy, high precision, reliability, comparability, and traceability). Laser-induced fluorimetry will be useful for the analysis of uranium in ores, certification of reference materials, borehole core assay, and other diverse applications in nuclear fuel cycle. Differential technique in spectrophotometry/laser fluorimetry has inherent high metrological quality. In principle, laser-induced fluorimetry is an ideal technique for the very accurate determination of uranium by the use of appropriate fluorescence-enhancing reagents and methodology depending upon the concentration of uranium and sample matrices.
Analytica Chimica Acta, 2001
A simple, rapid, cost-effective, accurate and precise differential laser-induced fluorimetric met... more A simple, rapid, cost-effective, accurate and precise differential laser-induced fluorimetric method for the direct determination of uranium in mineralised rocks at the percentage level is presented, based on the comparison of the fluorescence of the standard with a sample of similar but unknown concentration on the same sample weight basis, by the use of H 3 PO 4-NH 4 H 2 PO 4 as a fluorescence enhancing reagent. The relative standard deviation of the method was 0.3-0.5% (n = 9) for 0.04 and 3.4% U 3 O 8. The proposed technique is suitable for the determination of uranium in samples containing >0.01% uranium. The method has been evaluated using standards, SY-2, SY-3, low grade uranium ore-IAEA reference samples and core samples of diverse matrices. The results are in good agreement with the published data and those obtained by conventional fluorimetry and other methods and are of comparable precision to those obtained by titrimetric assay.
Analytica Chimica Acta, 1993