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- W2000337921 abstract "Abstract This work presents alternatives for Fe and Co determination in pharmaceutical samples using flow analysis. The first procedure describes Fe extraction in mineral/vitamin complexes. The best conditions were reached when HNO3 concentration and volume, sample mass and shaking time were 1.0 mol l−1, 5 ml, 25 mg and 10 min. Three mineral/vitamin complexes of known concentrations (ranging from 12 to 32 g kg−1) were analyzed (10 authentic replicates for each) and recoveries of around 100% were obtained when compared with a well-established mineralization procedure employing concentrated HNO3 and H2O2 (30% w/v). The second work part shows the employment of Tiron and H2O2 reaction for Co determination in a drug for inappetence. The results (352±18.7 mg kg−1) were compared with those using Electrothermal Atomic Absorption Spectrometry—ETAAS (346±15.7 mg kg−1). The proposed method showed detection and quantification limits of 0.20 and 0.70 μg l−1, respectively. Both procedures for Fe and Co determination presented time, reagent and effort reduction." @default.
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- W2000337921 date "2004-10-01" @default.
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- W2000337921 title "Optimization of sample preparation using statistical methods: spectrophotometric determination of Fe and Co in pharmaceutical samples" @default.
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- W2000337921 doi "https://doi.org/10.1016/j.microc.2004.05.012" @default.
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