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Singh, Gyanendra
- A Generalized Adaptive Estimated Optimum Estimator of Finite Population Mean
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Authors
Affiliations
1 Department of Statistics, Lucknow University Lucknow-226007, IN
1 Department of Statistics, Lucknow University Lucknow-226007, IN
Source
International Journal of Statistics and Systems, Vol 8, No 1 (2013), Pagination: 1-14Abstract
A generalized estimator representing a class of estimators depending on estimated optimum value is investigated, i ts bias and mean square error are found and results of some particulars are shown to be the special cases of this study. The study gives an adaptive estimated optimum class of estimators having the minimum mean square error.Keywords
Auxiliary Information, Optimum Estimator, Class of Estimators, Mean Square Error And Efficiency
References
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- Determination of Azelastine in Different Samples by Poly (vinyl chloride) Based Membrane Electrode
Abstract Views :452 |
PDF Views:4
Authors
Affiliations
1 Department of Chemistry M.M.H. College Ghaziabad, IN
2 Department of Pharmacy, Mewar University ,Chittorgarh, Rajasthan – 312901, India, IN
1 Department of Chemistry M.M.H. College Ghaziabad, IN
2 Department of Pharmacy, Mewar University ,Chittorgarh, Rajasthan – 312901, India, IN
Source
Asian Journal of Pharmaceutical Analysis, Vol 3, No 2 (2013), Pagination: 7-41Abstract
The selective determination of bio-active material is very important for medical point of view. Ion-selective electrode are the device used for the selective determination of target species in solutions because these device measured activity instead of molar concentration. In this work we have tested NaTFPB as potential carrier for the selective determination of azelastine in solutions. The membrane with composition of azelastine-tetrafluorophenyl borate (AZ - TFPB): DOP: PVC of 4%: 64%: 32% (w/w) works satisfactorily in the concentration range of 1.8× 10-5 - 1.0×10-1 M, has a detection limit of 1.0 × 10-5 M and fast response time of 8 seconds. The proposed electrode can be used for a period of 3 weeks in a pH range of 2.5 - 6.0. The selectivity of membrane sensor towards target ions over some common interfering ions was calculated by MPM method.Keywords
Azelastine, Ion-selective Electrode, PVC, Ion-pair, Sodium Tetrafluorophenyl BorateReferences
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