• Title/Summary/Keyword: Atomic absorption analysis

Search Result 274, Processing Time 0.024 seconds

Analysis of Acetone Absorption Spectra Using Off-axis Integrated Cavity Output Spectroscopy for a Real-time Breath Test

  • Lim Lee;Yonghee Kim;Byung Jae Chun;Taek-Soo Kim;Seung-Kyu Park;Kwang-Hoon Ko;Ki-Hee Song;Hyunmin Park
    • Current Optics and Photonics
    • /
    • v.7 no.6
    • /
    • pp.761-765
    • /
    • 2023
  • We analyzed the absorption spectra of acetone in the 3.37 ㎛ mid-infrared range using the off-axis integrated cavity output spectroscopy technique to develop a real-time, in-line breath analysis device. The linear relationship between acetone concentration and absorption increase was confirmed as 0.32%/ppm, indicating that the developed device allows for a quantitative analysis of acetone concentration in exhaled breath. To further confirm the feasibility of using our device for breath analysis, we measured the acetone concentration of human breath samples at the sub-ppm level.

Atomic Absorption Spectrophotometric Analysis of Chromium, Nickel and Manganese in Stainless Steel (原子吸光分析에 의한 鋼鐵속에 있는 Cr, Mn 및 Ni 의 定量)

  • Hwang, Jae-Young;Tagliamonti, Josep J.;Parsons, Frank B.
    • Journal of the Korean Chemical Society
    • /
    • v.10 no.3
    • /
    • pp.133-135
    • /
    • 1966
  • Rapid methods for determining chromium, nickel, and manganese in stainless steel by atomic absorption spectrophotometer are described. Use of suitable standards eliminates the need to separate each element prior to analysis. Comparison with the conventional wet chemical analysis shows that atomic absorption spectrophotometer is a reliable analytical tool in these applications.

  • PDF

Characterization and Studies of Compromised Experimental Conditions for the Simultaneous Multielemental Analysis by Flame Atomic Absorption Spectrometry (원자흡수법을 이용한 다원소 동시 분석 실험 조건에 관한 기초 특성 연구)

  • 최성규;이현주;박양순;김효진
    • YAKHAK HOEJI
    • /
    • v.39 no.2
    • /
    • pp.148-152
    • /
    • 1995
  • For comparison between the compromised experimental condition and the best conditions for each element by flame atomic absorption spectrometer, the absorbances were measured with changing the burner height and HCL current. The optimum absorbance for simultaneous analysis of 6 elements was observed at 1 mA of HCL current and at 4 mm of burner height except Cr and Co. The stability of flame atomic absorption spectrometer on each element was found to be better than 5%. To investigated the accuracy of this instrument, POSCO RM-07 as a real sample was analysed at these compromised experimental conditions and found to be better than 0.04%.

  • PDF

Direct analysis of steels with a gas-jet assisted glow discharge lamp for atomic absorption spectrometry (글로우방전을 이용한 철강시료의 직접분석법에 관한 연구)

  • Kim, Hyo Jin;Woo, Jin Chun;Lim, Heoung Bin;Moon, Dae Won;Lee, Kwang Woo
    • Analytical Science and Technology
    • /
    • v.5 no.2
    • /
    • pp.185-190
    • /
    • 1992
  • A gas-jet assisted glow discharge lamp was attached to a conventional atomic absorption spectrophotometer in the place of a flame burner. To evaluate the accuracy of this method, the certified values and the analyzed values of SRM's were compared and atomic absorption sensitivity for five elements were also obtained. Factors affecting the sensitivity and areas for future improvement are discussed.

  • PDF

Optimization of Parameters for Simultaneous Multielemental Analysis by Atomic Absorption Spectrometry (원자흡수분광법에 의한 다원소 동시분석시 조건의 최적화)

  • Kim, Hyo Jin;Kang, Jong Seong
    • Analytical Science and Technology
    • /
    • v.6 no.4
    • /
    • pp.359-362
    • /
    • 1993
  • To find compromise experimental conditions that will allow a group of elements to be run on flame atomic absorption spectrometer without changing the burner height or gas flow rates, measurements were carried out. The optimum absorbance for simultaneous analysis of ten elements was observed at high flow rate of air-$C_2H_2$ as fuel and at 2mm of burner height. At the condition, 73% of mean relative absorbance were achieved.

  • PDF

Determination of Lead in Different Samples by Atomic Absorption Spectrometry after Preconcentration with Dithizone Immobilized on Surfactant-Coated Alumina

  • Dadfarnia, S.;Haji Shabani, A.M.;Dehgan Shirie, H.
    • Bulletin of the Korean Chemical Society
    • /
    • v.23 no.4
    • /
    • pp.545-549
    • /
    • 2002
  • A simple and rapid technique for the separation and preconcentration of lead in water and biological samples has been devised. Preconcentrationis based on the depositionof analyte onto a column packed with dithizone immobilized on sodium dodecyl sulfate coated alumina at pH $\geq$ 3. The trapped lead is eluted with 5 mL of 4 M nitric acid and determined by flame atomic absorption spectroscopy. A sample of 1 L, results in a preconcentration factor of 200 and the precision at 20${\mu}g$ $L^{-1}$ is 1.3%(n=8). The procedure is applied to tap water, well water, river water, vegetable extract and milk samples, and accuracy is assessed through recovery experiments and by independent analysis by furnace atomic absorption.

Determination of Trace Elements in Urine Samples by Graphite Furnace Atomic Absorption Spectrophotometry (흑연로 원자흡수분광광도법에 의한 뇨시료 중 흔적량 원소의 정량)

  • Choi, Chong-Moon;Choi, Hee-Seon;Park, Chang Joon;Kim, Young-Sang
    • Analytical Science and Technology
    • /
    • v.7 no.4
    • /
    • pp.555-561
    • /
    • 1994
  • A method was described for the graphite furnace atomic absorption spectrophotometric determination of trace cadmium, copper, chromium and lead in urine samples. The elements were directly determined without any other treatments. The ash temperature was intensively optimized to improve the large background by the removal of organic materials and alkali and alkali earth metals in urine samples. Two kinds of standard solutions were used to plot calibration curves. From the recovery data, it could be confirmed that the analytical results with the synthetic urine matrix similar to real urine were more accurate than with a deionized water matrix.

  • PDF

Benefits of the S/F Cask Impact Limiter Weldment Imperfection

  • Ku, Jeong-Hoe;Lee, Ju-Chan;Kim, Jong-Hun;Park, Seong-Won;Park, Hyun-Soo
    • Nuclear Engineering and Technology
    • /
    • v.32 no.2
    • /
    • pp.191-203
    • /
    • 2000
  • This paper describes the beneficial effect of weldment imperfection of the cask impact limiter, by applying intermittent-weld, for impact energy absorbing behavior. From the point of view of energy absorbing efficiency of an energy absorber, it is desirable to reduce the crush load resistance and increase the deformation of the energy absorber within certain limit. This paper presents the test results of intermittent-weldment and the analysis results of cask impacts and the discussions of the improvement of impact mitigating effect by the imperfect-weldment. The rupture of imperfect weldment of an impact limiter improves the energy-absorbing efficiency by reducing the crush load amplitude without loss of total energy absorption. The beneficial effect of weldment imperfection should be considered to the cask impact limiter design.

  • PDF

Some Interference Studies in Alkali and Alkali-Earth Metal Determination of Silicates by Atomic Absorption Spetrophotometry (원자흡광분석법에 의한 규산염중의 알칼리 및 알칼리토금속 정량시의 간섭에 대하여)

  • 박순자
    • Journal of the Korean Ceramic Society
    • /
    • v.13 no.4
    • /
    • pp.15-19
    • /
    • 1976
  • Mutual interferences of alkali and alkali-earth metals in atomic absorption were examined. For determination of Na or K interfering elements increase the absorbancy, and for Ca or Mg decrease. Since influences of coexisting elements become nearly constant by addition of large amount of same coexisting element, could be use mixed standard solution for alkali or alkali-earth metal determination in the presence of other alkali and alkali-earth metals. The metals can be readily incorporated into scheme of rapid silicate analysis. Precision and accuracy are good.

  • PDF