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Anjaiah, K. V.
- International Proficiency Tests for Analytical Geochemistry Laboratories: An Assessment of Accuracy and Precision in Routine Geochemical Analysis
Abstract Views :178 |
PDF Views:2
Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad 500 007, IN
1 National Geophysical Research Institute, Hyderabad 500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 53, No 4 (1999), Pagination: 417-423Abstract
The results of Second International Proficiency Test (GeoPT2) obtained at the Geochemical Laboratory of National Geophysical Research Institute are presented. Estimation of 33 trace elements including all the fourteen rare earths obtained by ICP-MS in Bardon Volcanic Tuff Samples (OU-1) are compared with the assigned values. Sample decomposition method and other relevant details of the analytical procedures adopted are presented. Depending upon the 'Z-scores' calculated, the fitness of the data for either "pure geochemistry" or "applied geochemistry" was assessed. An overview of 'Z-score' results indicates that about 2/3rds of the data contributed from our laboratory fell within the -2<z<2 range which included majority of the trace and rare earth elements used normally in several pure geochemical investigations. These results allowed us to further investigate the analytical discrepancies observed in the data and optimize necessary aspects such as sample preparation by the use of more effective dissolution methods like microwave digestion and minimise the interference effects by the use of matrix matching calibrations.Keywords
Analytical Geochemistry, Pure Geochemistry, Applied Geochemistry, ICP-MS, Trace Elements, REE, Microwave Dissolution, 'Z-Score'.
- Concentration of Gold in Natural Waters from Lateritic Terrain, Wynad-Nilambur Gold Field, Kerala, India and its Possible Role in Exploration
Abstract Views :171 |
PDF Views:2
Authors
Affiliations
1 Centre for Earth Science Studies, Akkulam, Trivandrum - 695031, IN
2 National Geophysical Research Institute, Hyderabad - 500 007, IN
1 Centre for Earth Science Studies, Akkulam, Trivandrum - 695031, IN
2 National Geophysical Research Institute, Hyderabad - 500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 52, No 3 (1998), Pagination: 301-304Abstract
Water samples from wells adjoining abandoned mines in the Wynad-Nilambur Gold Field were analysed by ICP-MS for gold and values ranging from 0.05 ppb to 0.22 ppb obtained. Though gold in the water samples is in very low concentration, the study suggests that it is possible to use water samples in hydrogeochemical prospecting for gold by adopting ICP-MS instrumental technique after preconcentration of gold by activated charcoal. The procedure is very sensitive with detection limit approaching 0.1 parts per trillion.Keywords
Hydrogeochemistry, Gold, ICP-MS, Wynad-Nilambur Gold Fields, Kerala.- Platinum Group Minerals from the Madawara Ultramafic-Mafic Complex, Bundelkhand Massif, Central India: A Preliminary Note
Abstract Views :262 |
PDF Views:197
Authors
S. P. Singh
1,
V. Balaram
2,
M. Satyanarayanan
2,
D. S. Sarma
2,
K. S. V. Subramanyam
2,
K. V. Anjaiah
2,
A. Kharia
1
Affiliations
1 Department of Geology, Bundelkhand University, Jhansi - 284001, Uttar Pradesh, IN
2 National Geophysical Research Institute (CSIR), Uppal Road, Hyderabad - 500 007, IN
1 Department of Geology, Bundelkhand University, Jhansi - 284001, Uttar Pradesh, IN
2 National Geophysical Research Institute (CSIR), Uppal Road, Hyderabad - 500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 78, No 3 (2011), Pagination: 281-283Abstract
No Abstract.Full Text
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