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Papers by J. Schlatter
Objective: To assess the stability of doxorubicin combined with Radioselectan Ò . Methods: Soluti... more Objective: To assess the stability of doxorubicin combined with Radioselectan Ò . Methods: Solutions of doxorubicin 5 mg/mL were prepared from commercially available 50 mg powder with 10 mL of Radioselectan Ò . They were stored in glass syringes at 4, 25 and 45°C. The concentrations of doxorubicin were determined using a stability-indicating high-performance liquid chromatography method. The initial and final pHs of solutions were compared. The times (t 90 ) needed for doxorubicin to fall to 90% of its initial concentration were calculated by a linear regression analysis.
Journal of Analytical Methods in Chemistry, 2015
A stability-indicating method was validated for the determination in pharmaceutical forms of ideb... more A stability-indicating method was validated for the determination in pharmaceutical forms of idebenone a coenzyme Q10-like compound. The assay was achieved by liquid chromatography analysis using a reversed-phase C18 column and a detector set at 480 nm. The optimized mobile phase consisted of isocratic flow rate at 1.0 mL/min for 3 min with methanol. The linearity of the assay was demonstrated in the range of 3.0 to 8.0 mg/mL with a correlation coefficient r (2) > 0.998. The limits of detection and quantification were 0.03 and 0.05 mg/mL, respectively. The intraday and interday precisions were less than 1.0%. Accuracy of the method ranged from 98.6 to 101.5% with RSD < 0.6%. Specificity of the assay showed no interference from tablets components and breakdown products formed by alkaline, acidic, oxidative, sunlight, and high temperature conditions. This method allows accurate and reliable determination of idebenone for drug stability assay in pharmaceutical studies.
International Journal of Analytical Chemistry, 2015
A stability-indicating assay by reversed-phase high performance liquid chromatography (RP-HPLC) m... more A stability-indicating assay by reversed-phase high performance liquid chromatography (RP-HPLC) method was developed for the determination of pentobarbital sodium in oral formulations: a drug used for infant sedation in computed tomography (CT) or magnetic resonance imaging (MRI) scan. The chromatographic separation was achieved on a reversed-phase C18 column, using isocratic elution and a detector set at 214 nm. The optimized mobile phase consisted of a 0.01 M potassium buffer pH 3 and methanol (40 : 60, v/v). The flow rate was 1.0 mL/min and the run time of analysis was 5 min. The linearity of the method was demonstrated in the range of 5 to 250 μg/mL pentobarbital sodium solution (r (2) = 0.999). The limit of detection and limit of quantification were 2.10 and 3.97 μg/mL, respectively. The intraday and interday precisions were less than 2.1%. Accuracy of the method ranged from 99.2 to 101.3%. Stability studies indicate that the drug is stable to sunlight and in aqueous solution. Accelerated pentobarbital sodium breakdown by strong alkaline, acidic, or oxidative stress produced noninterfering peaks. This method allows accurate and reliable determination of pentobarbital sodium for drug stability assay in pharmaceutical studies.
![Research paper thumbnail of [Drug administration to paediatric inpatient]](https://attachments.academia-assets.com/39776197/thumbnails/1.jpg)
](Archives de pédiatrie : organe officiel de la Sociéte française de pédiatrie, 2004
Available commercial drugs in France are often unsuitable for children. The aim of this study was... more Available commercial drugs in France are often unsuitable for children. The aim of this study was, for every medicinal form orally or parenterally administered, to identify and to quantify difficulties met by the nurses administering drugs to paediatric inpatients and to propose solutions to main identified problems. The study was realized in 14 hospitals by direct observation. The observer, provided with a questionnaire, followed during a time slot of at least 2 h for one or several nurses and raised all the oral or injectable administrations. One thousand and nine hundred forty-six observations were performed. The children were 12.6 +/- 17 months old, and weighed 8.5 +/- 9.4 kg. Injectable drugs: half of the observations showed a posology and a mode of dilution not corresponding to the summary of product characteristics. Eight percent of orally administered drugs were injectable drugs. In 35.5% of cases, administered amount was lower than the quarter of the present quantity in the...
Objective: To assess the stability of doxorubicin combined with Radioselectan Ò . Methods: Soluti... more Objective: To assess the stability of doxorubicin combined with Radioselectan Ò . Methods: Solutions of doxorubicin 5 mg/mL were prepared from commercially available 50 mg powder with 10 mL of Radioselectan Ò . They were stored in glass syringes at 4, 25 and 45°C. The concentrations of doxorubicin were determined using a stability-indicating high-performance liquid chromatography method. The initial and final pHs of solutions were compared. The times (t 90 ) needed for doxorubicin to fall to 90% of its initial concentration were calculated by a linear regression analysis.
Journal of Analytical Methods in Chemistry, 2015
A stability-indicating method was validated for the determination in pharmaceutical forms of ideb... more A stability-indicating method was validated for the determination in pharmaceutical forms of idebenone a coenzyme Q10-like compound. The assay was achieved by liquid chromatography analysis using a reversed-phase C18 column and a detector set at 480 nm. The optimized mobile phase consisted of isocratic flow rate at 1.0 mL/min for 3 min with methanol. The linearity of the assay was demonstrated in the range of 3.0 to 8.0 mg/mL with a correlation coefficient r (2) > 0.998. The limits of detection and quantification were 0.03 and 0.05 mg/mL, respectively. The intraday and interday precisions were less than 1.0%. Accuracy of the method ranged from 98.6 to 101.5% with RSD < 0.6%. Specificity of the assay showed no interference from tablets components and breakdown products formed by alkaline, acidic, oxidative, sunlight, and high temperature conditions. This method allows accurate and reliable determination of idebenone for drug stability assay in pharmaceutical studies.
International Journal of Analytical Chemistry, 2015
A stability-indicating assay by reversed-phase high performance liquid chromatography (RP-HPLC) m... more A stability-indicating assay by reversed-phase high performance liquid chromatography (RP-HPLC) method was developed for the determination of pentobarbital sodium in oral formulations: a drug used for infant sedation in computed tomography (CT) or magnetic resonance imaging (MRI) scan. The chromatographic separation was achieved on a reversed-phase C18 column, using isocratic elution and a detector set at 214 nm. The optimized mobile phase consisted of a 0.01 M potassium buffer pH 3 and methanol (40 : 60, v/v). The flow rate was 1.0 mL/min and the run time of analysis was 5 min. The linearity of the method was demonstrated in the range of 5 to 250 μg/mL pentobarbital sodium solution (r (2) = 0.999). The limit of detection and limit of quantification were 2.10 and 3.97 μg/mL, respectively. The intraday and interday precisions were less than 2.1%. Accuracy of the method ranged from 99.2 to 101.3%. Stability studies indicate that the drug is stable to sunlight and in aqueous solution. Accelerated pentobarbital sodium breakdown by strong alkaline, acidic, or oxidative stress produced noninterfering peaks. This method allows accurate and reliable determination of pentobarbital sodium for drug stability assay in pharmaceutical studies.
Archives de pédiatrie : organe officiel de la Sociéte française de pédiatrie, 2004
Available commercial drugs in France are often unsuitable for children. The aim of this study was... more Available commercial drugs in France are often unsuitable for children. The aim of this study was, for every medicinal form orally or parenterally administered, to identify and to quantify difficulties met by the nurses administering drugs to paediatric inpatients and to propose solutions to main identified problems. The study was realized in 14 hospitals by direct observation. The observer, provided with a questionnaire, followed during a time slot of at least 2 h for one or several nurses and raised all the oral or injectable administrations. One thousand and nine hundred forty-six observations were performed. The children were 12.6 +/- 17 months old, and weighed 8.5 +/- 9.4 kg. Injectable drugs: half of the observations showed a posology and a mode of dilution not corresponding to the summary of product characteristics. Eight percent of orally administered drugs were injectable drugs. In 35.5% of cases, administered amount was lower than the quarter of the present quantity in the...