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Displaying 1-4 of 4 results for Tag: Drug Substance
AN1148: Assay of Nitrite and Determination of Nitrate Impurity in Sodium Nitrite Using a Reagent-Free Ion Chromatography System
Instrument Type: ICThis application note reports our evaluation of the IC method for nitrite assay and nitrate determination in the proposed revision of the United States Pharmacopeia (USP) monograph for sodium nitrite using an electrolytically generated potassium carbonate/bicarbonate eluent to execute the method rather than the manually prepared sodium carbonate/sodium bicarbonate eluent described in the PF proposal.
IC Assay for Lithium, Sodium, and Calcium in Lithium Carbonate Using a Compact Ion Chromatography System
Instrument Type: ICLithium carbonate is used to treat a number of mental health problems associated with chemical imbalance in the brain. Sodium and calcium are possible cationic impurities in lithium carbonate preparations. This record shows a method that uses a Thermo Scientific Dionex IonPac CS16 cation-exchange column, an electrolytically generated MSA eluent, and suppressed conductivity detection to determine lithium, sodium, and calcium in lithium carbonate that was published in Application Note 1090. In this record the method is executed using an Integrion ion chromatography system.
AN61: Determination of Tobramycin and Impurities Using HPAE-PAD
Instrument Type: ICIn this application note, we combine the CarboPac PA1, eluent generator with CR-ATC, and disposable Au working electrodes to demonstrate an improved HPAE-PAD technology for tobramycin purity analysis.
Determination of N-Methylpyrrolidine in Cefepime Using a Reagent-Free Ion Chromatography System
Instrument Type: ICThis application describes a cation-exchange chromatography method for the determination of N-methylpyrrolidine (NMP) in Cefepime using the Thermo Scientific Dionex IonPac CS17 column and suppressed conductivity detection.
