• Title, Summary, Keyword: Atomic Absorption Spectrometry

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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
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    • v.39 no.2
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    • pp.148-152
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    • 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%.

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Comparison of analytical methods for quantifying total chromium in soil using Atomic Absorption Spectrometer (AAS) and Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) (토양 시료 중 Atomic Absorption Spectrometry (AAS) 및 Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES)를 이용한 총 크롬 분석방법 비교)

  • Lee, Hong-gil;Kim, Ji-in;Byun, Yoonjoo;Kim, Hyunkoo;Yoon, Jeong Ki
    • Journal of Soil and Groundwater Environment
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    • v.22 no.6
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    • pp.22-28
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    • 2017
  • The accuracy of analytical results in response to the use of different additives ($NH_4Cl$, KCl, $LaCl_3$) and oxidant gases was evaluated and compared by using Atomic Absorption Spectrometry (AAS). Identification of spectroscopic interferences and possible improvements in Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) analysis were also discussed. The average accuracies of total chromium using Certified Reference Materials (CRMs) were found to be 72.1~94.2% in air/acetylene flame condition by AAS, and they were improved to 100.5~110.5% when the oxidants was changed to nitrous oxide rather than adding the additives. The field samples showed similar trends to CRMs, but chromium concentrations were highly variable depending on analytical conditions. The average accuracies using CRMs were estimated to be 89.3~166.1% by ICP-AES, and improved to below 121.7% after eliminating iron interference. Field samples with low chromium and high iron concentration were measured to be > 30% lower in total chromium concentrations by ICP-AES than AAS in nitrous oxide/acetylene flame. Total chromium concentrations in soil could be analyzed with better accuracy under nitrous oxide/acetylene flame by AAS because it was more effective to increase the temperature of the flame than to eliminate the chemical interference for maximizing atomization of chromium. When using ICP-AES, interference substances, total chromium levels, and analytical conditions should be also considered.

Determination of Trace Copper in Seawater by Solvent Extraction and Atomic Absorption Spectrometry (용매추출과 원자 흡수분리법에 의한 해수중의 미량 구리의 정량)

  • 박종안;정창웅
    • Journal of Environmental Health Sciences
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    • v.19 no.2
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    • pp.40-45
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    • 1993
  • A solvent extraction system of copper-thiocyanate complex into various types of alkylamines such as secondary, tertiary and quaternary ammonium salt for the determination of trace copper by atomic absorption spectrometry is presented. The maximum extraction of copper shows at 0.1 M-thiocyanate and single extraction with 10 ml of 1% amine-MIBK from 50 ml of aqueous solution is enough to be quantitative for micro amounts of copper. The effect of amine diluents and of diverse ions are also examined.

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Improvement of Analytical Method for Determination of Germanium in Plant by Atomic Absorption Spectrometry (원자흡광분광법에 의한 식물체 중의 게르마늄 분석법 개선)

  • Han, Seong-Soo;Rim, Yo-Sup;Kim, Il-Kwang
    • Analytical Science and Technology
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    • v.10 no.3
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    • pp.179-186
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    • 1997
  • This study was carried out to improve the analytical method for determination of germanium in plants by atomic absorption spectrometry with graphite furnace. For the decomposition of plant samples, the mixed acid of $HNO_3+HClO_4+H_2SO_4$(10 : 4 : 1, v/v) was used. Under this condition, time requirement for the decomposition was 4~5 days and recovery rate was more than 98%. Solution for filling up to constant volume after decomposition was 0.1M acetic acid-sodium acetate. Detection limit for determination of germanium was 0.02 ppm by atomic absorption spectrometry with graphite furnace and argon gas. These results were corresponded with the above-mentioned research projects for improving the determination method of germanium in plants.

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Prenconcentration and Determination of Mercury (II) and Methylmercury in Waters by Immobilized 1,5-Diphenylcarbazone and Cold Vapor Atomic Absorption Spectrometry

  • Dadfarnia, Shayessteh;Salmanzadeh, Ali Mohammed;Haji Shabani, Ali Mohammed
    • Bulletin of the Korean Chemical Society
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    • v.23 no.12
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    • pp.1719-1723
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    • 2002
  • 1,5-diphenylcarbazone was immobilized on sodium dodecyl sulfate coated alumina. The alumina particle was effectively used for collection of mercury(II) and methylmercury cations at sub-ppb level. The adsorbed mercury was eluted with l mol $L^{-1}$ of hydrobromic acid solution. The mercury(II) was then directly measured by cold vapor atomic absorption spectrometry utilizing tin (II) chloride where as the total mercury was determined after the oxidation of methylmercury into the inorganic mercury. The methylmercury concentration was calculated by the difference between the value of total mercury and mercury (II). Mercury (II) and methylmercury cations were completely recovered from water with a preconcentration factor of 100 (for 1 L solution.) Relative standard deviation at Hg L ${\mu}gL^{-1}$ level 1.7%(n=8) and the limit of detection was 0.11 ${\mu}gL^{-1}$. The procedure was applied to spring water, well water and seawater and accuracy was assessed through recovery experiments.

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
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    • v.6 no.4
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    • pp.359-362
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    • 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.

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Preparation and analysis of lyophilized whole blood as external quality control materials for Pb and Cd determination by graphite furnace atomic absorption spectrometry (흑연료 원자흡수 분광법에 의한 혈중의 납, 카드뮴 정량을 위한 외부정도관리 시료제조 및 분석)

  • Lee, Kong-Joo;Lim, H.B.
    • Analytical Science and Technology
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    • v.8 no.3
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    • pp.273-279
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    • 1995
  • Lyophilized whole blood samples containing various concentrations of Pb and Cd have been prepared as external quality control materials. These materials have been characterized with graphite furnace atomic absorption spectrometry(GFAAS), The optimized conditions for the quantitative determination of Ph and Cd in whole blood using GFAAS were obtained at the ashing temperature of $600{\sim}650^{\circ}C$ with 0.1% ammonium dihydrogen phosphate and 0.1% Triton X-100 as matrix modifier. Homogeniety and stability of the prepared whole blood have been studied at the optimized analytical condition.

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Determination of blood lead concentration by the atomic absorption spectrometry with graphite furnace-Comparison of blood lead concentration between occupationally exposed workers and control group (흑연로 장치가 부착된 원자흡광분석기를 이용한 혈중 납 농도 측정-직업적으로 납에 폭로된 근로자들과 비폭로 대조군간의 혈중 납 농도 비교)

  • Yang, Jeong Sun;Kang, Seong Kyu;Choi, Byung Sun;Park, In Jeong;Park, Dong Wook;Oh, Se Min;Jeong, Ho Keun
    • Analytical Science and Technology
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    • v.6 no.4
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    • pp.363-368
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    • 1993
  • Blood lead concentrations of occupationally exposed workers were measured by the atomic absorption spectrometry with graphite furnace. The concentrations of the unexposed group were also checked and compaired with those of the exposed one. The correlation of smoking habit and work duration with the blood lead concentration was also surveyed.

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Indirect Determination of Nitrite by Flame Atomic Absorption Spectrometry Using a Lead(IV) Dioxide Oxidant Microcolumn

  • Noroozifar, Meissam;Khorasani Motlagh, Mozhgan;Taheri, Aboozar;Homayoonfard, Marjan
    • Bulletin of the Korean Chemical Society
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    • v.27 no.6
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    • pp.875-880
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    • 2006
  • A new, simple and fast flow injection analysis (FIA) method has been developed for the indirect determination of nitrite. The proposed indirect automatic method is based on the oxidation of nitrite to nitrate using a lead(IV) dioxide oxidant microcolumn where the flow of the sample through the microcolumn reduces the $PbO_2$ solid phase reagent to Pb(II), which is measured by flame atomic absorption spectrometry. The absorbance of Pb(II) are proportional to the concentration of nitrite in the samples. The calibration curve was linear up to 30 mg $L ^{-1}$, with a detection limit of 0.11 mg $L ^{-1}$ for a 400 mL injected sample volume and a sampling rate of about 80 $h ^{-1}$. The results exhibit no interference from the presence of large amounts of ions. The developed procedure was found to be suitable for the determination of nitrite in foodstuffs and wastewaters. A relative standard deviation better than 0.9% was obtained in a repeatability study. The reliability of the method was established by parallel determination against the standard method.

Multielement Analysis in Airborne Particulate Matter $(PM_{10})$ by INAA, ICP and AAS (INAA.ICP.AAS를 이용한 대기먼지 $(PM_{10})$의 다원소분석)

  • 정용삼;문종화;정영주;박광원;이길용;윤윤열;심상권;조경행;한명섭
    • Journal of Korean Society for Atmospheric Environment
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    • v.15 no.4
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    • pp.495-503
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    • 1999
  • Airborne particulate matter $(PM_{10})$ collected using high volume air sampler and silica fiber filter were analyzed by Instrumental Neutron Activation Analysis(INAA), Inductively Coupled Plasma Atomic Emission Spectrometry(ICP-AES) and Atomic Absorption Spectrometry(AAS), and the results were compared with each other. 30~40 trace elements in environmental standard reference materials(NIST SRM 1648 and NIES CRM No.8) were analyzed for the analytical quality control. The relative error for two-third of elements detected was less than 10%, and the standard deviation was less than 15%. During the sampling period for 24 hours, the mass concentration of total suspended particulate was 36.1$\mu\textrm{g}$/㎥ and the value is lower than the critical level in Korea. In the results of NAA, the elements of Al, As, Ba, Fe, La, Mg, Na, Sb, Zn were well agreed with those of other methods. In statistical estimation between different methods, the deviation of Al, Ba, Cr, Fe was less than 10% and quite reliable.

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