Determination of calcium in tablets containing calcium citrate using thermogravimetry (TG)
作者： Eliane Gonçalves De Araújo , Francisca Edivânia De Morais , Elisama Vieira Dos Santos , Carlos Alberto Martinez-Huitle , Márcia Lima Da Silva
DOI: 10.18362/BJTA.V2I1.7
关键词:
摘要: The present study utilized thermogravimetry (TG) and optical emission spectroscopy with inductively coupled plasma (ICP/OES) to determine the amount of calcium in citrate tablets, which are used for treatment osteoporosis. samples were characterized using Fourier transform infrared (FTIR), termogravimetry/derivative (TG/DTG), differential thermal analysis (DTA), scanning calorimetry (DSC) X-ray diffraction (XRD). In DTA DSC curves obtained, both endo- exothermic events observed, indicative dehydration decomposition, respectively. diffractograms showed that crystallinity. Additionally, peaks observed indicate presence a hydroxide residue due reaction between oxide moisture air. content obtained by TG from tablet sample (17.77%) was similar ICP-OES (16.84%).
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