선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- The new developed method is both a selective and a repeatable method for separation and precon centration and determination of ultra trace amounts of lead(II). The modified activated carbon phase is stable for several treatments of sample solutions without the need for using any chemical reagents.
- The method was used for two different water samples for Pb(II) determination: Zayandeh Roud river water (Isfahan) and tap water. The river water samples were directly measured by the proposed method after filtering with a Hlter paper (Schleicher & Schuell No. 5893, Blue ribbon). For each sample, 250 mL was passed through the column as explained by the recommended procedure.
대상 데이터
- A Perkin-Elmer® (USA), Model 2380 atomic absorption spectrometer furnished with a lead hollow-cathode lamp was used. The instrument was set at a wavelength of 217.
- 1. The hardware of the system was composed of a 32 channel I/O card (PCL-720, Advantech®, Taiwan) which has a power relay module to convert the output of I/O card to 220 V AC, a peristaltic pump (Ismatec®, ISM 404, Switzerland), three 220v AC electrical valves, a silicon rubber tubing pump (2.06 mm i.d.) and a PC computer, Pentium II (233 MHz). A program was written in Borland C++ by the authors to monitor and to control the system.
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