Spectroscopy and Spectral Analysis, Volume. 42, Issue 8, 2334(2022)

Research on Optimization of Determination Conditions for Trace Gold Analysis by Graphite Furnace Atomic Absorption Spectrometry Based on RSM Model

Peng WANG*, Qian-ni MEN*;, Li-ming GAN, and Ke YANG
Author Affiliations
  • Xi’an Center of Mineral Resources Survey, China Geological Survey, Xi’an 710100, China
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    Figures & Tables(7)
    Comparison of experimental value and predicted value of absorbance
    Response surface map and contour map of modeling condition interaction(a): Interaction of lamp current and atomization temperature on absorbance;(b): Interaction of lamp current and ashing temperature on absorbance;(c): Interaction of ashing temperature and atomization temperature on absorbance
    • Table 1. Operating conditions and temperature program parameters of graphite furnace atomic absorption spectrophotometer

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      Table 1. Operating conditions and temperature program parameters of graphite furnace atomic absorption spectrophotometer

      待测元素Au程序开始温度/℃结束温度/℃升温时间/s保持时间/s载气量
      波长242.8 nm干燥80120102200
      光谱宽度0.2 nm120160123200
      灯电流7.0 mA灰化400600103200
      载气高纯氩气原子化2 3002 300530
      进样体积20 μL清除2 4002 40052200
    • Table 2. Factor level table of Box-Behnken response surface test

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      Table 2. Factor level table of Box-Behnken response surface test

      因素代码水平
      -101
      灯电流/mAA678
      灰化温度/℃B300400500
      原子化温度/℃C2 2002 3002 400
    • Table 3. Experimental results of Box-Behnken response surface methodology

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      Table 3. Experimental results of Box-Behnken response surface methodology

      试验号代码值吸光度试验号代码值吸光度
      A/mAB/℃C/℃试验值预测值A/mAB/℃C/℃试验值预测值
      175002 2000.093 70.093 6974002 3000.110 20.108 0
      275002 4000.095 50.094 01074002 3000.106 50.108 0
      384002 4000.094 60.095 61165002 3000.084 40.085 5
      474002 3000.108 70.108 01273002 2000.084 50.086 0
      574002 3000.106 70.108 01363002 3000.083 30.082 9
      685002 3000.092 40.092 91484002 2000.090 20.089 8
      764002 2000.088 60.087 61583002 3000.086 50.085 4
      873002 4000.091 60.091 71664002 4000.087 50.087 9
    • Table 4. Results of variance analysis of quadratic regression equation model of response surface

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      Table 4. Results of variance analysis of quadratic regression equation model of response surface

      来源平方和自由度均方Fp
      模型0.001 290.000 143.95<0.000 1
      A0.000 010.000 015.950.007 2
      B0.000 110.000 116.270.006 8
      C0.000 010.000 06.000.049 9
      AB5.760×10-615.760×10-61.860.222 0
      AC7.562×10-617.562×10-62.440.169 5
      BC7.022×10-617.022×10-62.260.183 2
      A20.005 510.000 5162.77<0.000 1
      B20.000 410.000 4132.46<0.000 1
      C20.000 210.000 255.510.000 3
      残差0.000 063.103×10-6
      失拟项9.353×10-633.118×10-61.010.497 1
      误差项9.268×10-633.098×10-6
      总和0.001 215
      R2=0.985 1,校正决定系统=0.962 6,信噪比(S/N)=18.076 5(>5)
    • Table 5. Determination result of the mass content of the national first-level reference material gold

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      Table 5. Determination result of the mass content of the national first-level reference material gold

      标准样品编号GBW07243bGBW07806aGBW07244bGBW07245bGBW07246aGBW07247a
      测定结果/
      (ng·g-1)
      11.4633.3754.9879.26319.61949.742
      21.2703.2034.96510.61618.22252.020
      31.4423.2034.9659.15521.98248.990
      41.3132.6454.96512.35719.21154.061
      51.6353.2034.98710.91718.73852.256
      61.5922.6664.7299.19819.40451.461
      71.3773.0104.7509.86421.14453.911
      81.6142.9894.8369.26320.15650.946
      91.5712.6455.13710.20818.69549.184
      101.6143.1614.98711.51018.73853.954
      111.5713.2464.62210.40119.53351.569
      121.5282.8605.0519.67119.61848.818
      平均值1.432.984.9210.2019.5551.41
      标准值1.53.15.110.421.350.0
      准确度Δlgc0.000.010.020.010.040.01
      精密度RSD8.328.774.789.979.974.87
      合格判断合格合格合格合格合格合格
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    Peng WANG, Qian-ni MEN, Li-ming GAN, Ke YANG. Research on Optimization of Determination Conditions for Trace Gold Analysis by Graphite Furnace Atomic Absorption Spectrometry Based on RSM Model[J]. Spectroscopy and Spectral Analysis, 2022, 42(8): 2334

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    Paper Information

    Category: Orginal Article

    Received: Jun. 30, 2021

    Accepted: --

    Published Online: Mar. 17, 2025

    The Author Email: Peng WANG (shaanxiwangpeng@163.com)

    DOI:10.3964/j.issn.1000-0593(2022)08-2334-06

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