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  • agent consumption/ — utilization  (1)
  • derivative spectrophotometry  (1)
  • Springer  (2)
  • International Union of Crystallography (IUCr)
  • Wiley
  • Oxford University Press
  • American Chemical Society (ACS)
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Verlag/Herausgeber
  • Springer  (2)
  • International Union of Crystallography (IUCr)
  • Wiley
  • Oxford University Press
  • American Chemical Society (ACS)
Erscheinungszeitraum
  • 1
    ISSN: 1436-5073
    Schlagwort(e): solid-phase spectrophotometry ; derivative spectrophotometry ; pyrocatechol violet ; tungsten determination ; natural and industrial waters
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Derivative spectrophotometry was applied to solid-phase spectrophotometry in order to enhance its sensitivity and remove the large background caused by the absorbance of the resin layer. Determination of micro-amounts of tungsten with pyrocatechol violet to form a 2∶1 green complex in acid medium which is fixed on a dextran-type anion-exchange resin (Sephadex QAEA-25) is described as an example for the application of this technique. The absorbance of the resin packed in a 1-mm spectrophotometric cell, was measured directly. The characteristic peak amplitude of the signal at 674 nm in the first-derivative spectrum is useful for quantitative determination of tungsten (3–16 μg 1−1; RSD 5.8%) in natural and industrial water samples.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    European journal of clinical pharmacology 37 (1989), S. 139-143 
    ISSN: 1432-1041
    Schlagwort(e): benzodiazepine ; Chile ; agent consumption/ — utilization ; diazepam ; flunitrazepam
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Medizin
    Notizen: Summary The consumption of benzodiazepine drugs (BDZ) in Chile in the period 1982–1986 has been studied by the DDD method. National use was assessed using drug import forms as a source of information, assuming that the total amount imported was manufactured and consumed in the same year. The utilization did not show a constant pattern, being 32.7, 33.6, 50.2, 34.9, and 31.3 DDD 1000 per inhabitants per day in 1982, 1983, 1984, 1985 and 1986, respectively. During the study period, diazepam was the most commonly used agent amongst anxiolytic BDZ, reaching a peak of 27.1 DDD per 1000 inhabitants per day in 1984, and flunitrazepam was the most popular hypnotic, attaining its maximum in 1986 (6.4 DDD per 1000 inhabitants per day). The use of BDZ at community pharmacy level was also evaluated, employing the International Marketing System (IMS) as the source of information. At that level the pattern of utilization showed a constant increase during the study period, being 14.9 and 25.8 DDD/1000 inhabitants/per day in 1982 and 1986, respectively. In community pharmacies the anxiolytic BDZ most often consumed was diazepam (maximum 9.1 DDD per 1000 inhabitants per day in 1985), and the commonest hypnotic was flunitrazepam (peak 6.0 DDD per 1000 inhabitants per day in 1986). National consumption of BDZ appeared higher and more variable than use at the community pharmacy level, but in both there was greater usage of anxiolytic than of hypnotic BDZ, and diazepam and flunitrazepam were the most popular agents.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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