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131 Newest Publications of Libertas Academica

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New Article: Conductimetric Biosensor for the Detection of Uric Acid by Immobilization Uricase on Nata de Coco Membrane—Pt Electrode

03-Jul-2011 | Analytical Chemistry Insights, 2011

A conductimetric enzyme biosensor for uric acid detection has been developed. The uricase, as enzyme, is isolated from Candida utilis and immobilized on a nata de coco membrane-Pt electrode. The biosensor demonstrates a linear response to urate over ...

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News: High Article Visibility in Open Access Journals

29-Jun-2011 | Analytical Chemistry Insights, 2011

Libertas' open access journals provide papers published in them with very high visibility compared with traditional controlled access journals. Papers are also accessible throughout the world, preventing access barriers caused by interna...

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New Article: Erratum for “Determination of Trace Amounts of Lead Using the Flotation-spectrophotometric method”

06-Jun-2011 | Sabah Shiri, Ali Delpisheh, Ali haeri, Abdolhossein Poornajaf , Babakgolzadeh and Sina Shiri, Analytical Chemistry Insights, 2011

No abstract supplied by author...

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New Article: New Spectrophotometric Method for Determining Nitrogen Dioxide in Air Using 2,2-azino-bis(3-ethyl benzothiazoline)- 6-Sulfonic Acid-Diammonium Salt and Passive Sampling

29-May-2011 | Alaa A. Salem, Ahmed A. Soliman and Ismail A. El-Haty, Analytical Chemistry Insights, 2011

A new simple and highly sensitive spectrophotometric method for determining nitrogen dioxide in air was developed. The method is based on converting atmospheric nitrogen dioxide to nitrite ions within the IVL passive samplers used for samples collect...

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New Article: The Effect of Varying Short-Chain Alkyl Substitution on the Molar Absorptivity and Quantum Yield of Cyanine Dyes

23-Mar-2011 | Gala Chapman, Maged Henary and Gabor Patonay, Analytical Chemistry Insights, 2011

The effect of varying short-chain alkyl substitution of the indole nitrogens on the spectroscopic properties of cyanine dyes was examined. Molar absorptivities and fluorescence quantum yields were determined for a set of pentamethine dyes and a set o...

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New Article: Low Level Determinations of Methyl Methanesulfonate and Ethyl Methanesulfonate Impurities in Emtricitabine Active Pharmaceutical Ingredient by LC/MS/MS Using Electrospray Ionization

10-Mar-2011 | Analytical Chemistry Insights, 2011

Alkyl methanesulfonates have been highlighted as potential genotoxic impurities (PGIs). A sensitive LC/MS/MS method was developed and validated for the determination of Alkyl methanesulfonate impurities in Emtricitabine API (active pharmaceutical ing...

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New Article: Low Level Determinations of Methyl Methanesulfonate and Ethyl Methanesulfonate Impurities in Emtricitabine Active Pharmaceutical Ingredient by LC/MS/MS Using Electrospray Ionization

10-Mar-2011 | P.R. Kakadiya, T.G. Chandrashekhar, S. Ganguly, D.K. Singh and V. Singh, Analytical Chemistry Insights, 2011

Alkyl methanesulfonates have been highlighted as potential genotoxic impurities (PGIs). A sensitive LC/MS/MS method was developed and validated for the determination of Alkyl methanesulfonate impurities in Emtricitabine API (active pharmaceutical ing...

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New Article: Determination of Trace Amounts of Lead Using the Flotation-spectrophotometric method

01-Mar-2011 | Analytical Chemistry Insights, 2011

The present study describes a simple and highly selective method for separation, preconcentration and spectrophotometric determination of extremely low concentrations of lead. It is based on flotation of a complex of Pb2+ ions and Alizarin yellow bet...

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New Article: Determination of Trace Amounts of Lead Using the Flotation-spectrophotometric method

01-Mar-2011 | Sabah Shiri, Ali Delpisheh, Ali Haeri, Abdolhossein Poornajaf, Babak Golzadeh and Sina Shiri, Analytical Chemistry Insights, 2011

The present study describes a simple and highly selective method for separation, preconcentration and spectrophotometric determination of extremely low concentrations of lead. It is based on flotation of a complex of Pb2+ ions and Alizarin yellow bet...

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New Article: A Validated Reverse Phase HPLC Method for the Determination of Disodium EDTA in Meropenem Drug Substance with UV-Detection using Precolumn Derivatization Technique

23-Feb-2011 | Analytical Chemistry Insights, 2011

This paper deals with development and validation of a high performance liquid chromatographic method for the quantitative determination of disodium EDTA (Ethylenediaminetetraacetic acid) in Meropenem active pharmaceutical ingredient (API). EDTA was d...

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