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A study on the Organization Structrre for Pubilic Libraries in Korea (공공도서관 조직구조에 관한 이론적 고찰-법규적 측면에서 본 이론적 모형)

  • 손정표
    • Journal of Korean Library and Information Science Society
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    • v.5
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    • pp.33-65
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    • 1978

  • This study is an attempt to present a model of the organization structure for public libraries based on Standards for Public Libraries in Korea. The result of this study is as follows : (1) A library serving $50,000{\sim}80,000$ population should be organized with a staff of 4 persons and a part-time typist without actual departments. (2) A library serving $100,000{\sim}150,000$ population should be organized with a staff of 10 persons without actual departments. (3) A library serving $400,000{\sim}500,000$ population should be organized with a staff of 33 persons. $4{\sim}5$ sections and 2 branch libraries leveled with a section. (4) A library serving $900,000{\sim}1,000,000$ population should be organized with a staff of $62{\sim}66$ persons, an associate librarian, $4{\sim}5$ departments, $9{\sim}10$ sections and $4{\sim}5$ branch libraries leveled with a section. (5) A library serving $1,400,000{\sim}1,500,000$ population should be organized with a staff of 95 persons, an associate librarian, $5{\sim}6$ departments, $13{\sim}16$ sections, $6{\sim}8$ branch libraries leveled with a section and a full-time person taking charge of publicity. (6) A library serving $1,900,000{\sim}2,000,000$ population should be organized with a staff of 124 persons, 2 associate librarians, $7{\sim}8$ departments, 14 sections, 4 separate rooms without actual departments and $9{\sim}11$ branch libraries leveled with a section.

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Flotation-Spectrophotometric Determination of Ag(I) at the 10-7 mol L-1 Level Using Iodide and Ferroin as an Ion-associate

  • Hosseini, Mohammad Saeid;Hashemi-Moghaddam, Hamid
    • Bulletin of the Korean Chemical Society
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    • v.26 no.10
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    • pp.1529-1532
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    • 2005

  • A simple and cost effective method for separation and preconcentration of Ag(I) at the $10^{-7}\;mol\;L^{-1}$ level in the environmental and mineral samples is present. The method is based on the flotation of Ag(I)-iodide complex as an ion-associate with ferroin in pH of 4 from a large volume of an aqueous solution (500 mL) using nheptane. The floated layer was then dissolved in dimethylsulfoxide (DMSO) for the subsequent spectrophotometric determination. Beer's law was obeyed over a range of 2.0 ${\times}$ $10^{-7}$-4.0 ${\times}$ $10^{-6}$ mol $L^{-1}$ with the apparent molar absorptivity of 2.67 ${\times}$ $10^5$ L $mol^{-1}\;cm^{-1}$. The detection limit (n = 5) was 4 ${\times}$ $10^{-8}$ mol $L^{-1}$, and RSD (n = 5) obtained for 2.0 ${\times}$ $10^{-6}$ mol $L^{-1}$ of Ag(I) was 2.2%. The interference effects of a number of elements was studied and found that only $Hg^{2+}$ at low concentration, and $Pb^{2+}$, $Cd^{2+}$, $Cu^{2+}$, and $Fe^{3+}$ ions at moderately high concentrations were interfered. To overcome on these interference effects, the solution was treated with EDTA at a buffering pH of 4 and passed through a column containing Amberlite IR-120 ionexchanger resin, just before the flotation process. The proposed method was applied to determine of Ag(I) in a synthetic waste water, a photographic washing sample and a geological sample and the results was compared with those obtained from the flame atomic absorption spectrometry. The results were satisfactorily comparable with together, so that the applicability of the proposed method was confirmed in encountering with the real samples.

  • https://doi.org/10.5012/bkcs.2005.26.10.1529 인용 PDF KSCI