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用磷酸钠作基体改进剂石墨炉原子吸收光谱法直接测定海水中痕量镉

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韩恒斌, 乐晓春, 倪哲明. 用磷酸钠作基体改进剂石墨炉原子吸收光谱法直接测定海水中痕量镉[J]. 环境化学, 1986, 5(6): 34-42.
引用本文: 韩恒斌, 乐晓春, 倪哲明. 用磷酸钠作基体改进剂石墨炉原子吸收光谱法直接测定海水中痕量镉[J]. 环境化学, 1986, 5(6): 34-42.
shu
Han Hengbin, Le Xiaochun, Ni Zheming. DETERMINATION OF CADMIUM IN SEA WATER BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY USING SODIUM PHOSPHATE AS A MATRIX MODIFIER[J]. Environmental Chemistry, 1986, 5(6): 34-42.
Citation: Han Hengbin, Le Xiaochun, Ni Zheming. DETERMINATION OF CADMIUM IN SEA WATER BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY USING SODIUM PHOSPHATE AS A MATRIX MODIFIER[J]. Environmental Chemistry, 1986, 5(6): 34-42.
shu

用磷酸钠作基体改进剂石墨炉原子吸收光谱法直接测定海水中痕量镉

  • 1.

    中国科学院环境化学研究所

DETERMINATION OF CADMIUM IN SEA WATER BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY USING SODIUM PHOSPHATE AS A MATRIX MODIFIER

  • 1.

    Institute of Environmental Chemistry, Academia Sinica

  • 摘要: 本文描述了用Na3PO4作基体改进剂低温原子化石墨炉原子吸收光谱直接测定海水中痕量镉的方法。用Na3PO4作改进剂能够提高镉的灵敏度、减小氯化物、高氯酸盐和海水样品基体的干扰,并使海水中镉在850℃低温原子化,从而与背景吸收信号相分离。采用本方法测定海水中0.077μg/L镉的结果与用阳极溶出伏安法(ASV)测定结果相一致,海水中镉的回收率为94—103%。该方法简便、可靠。
    Abstract: A method is described for the determination of trace levels of cadmium in sea water by graphite furnace atomic absorption spectrometry using Na3PO4 as a matrix modifier and low temperature atomization. The utilization of Na3PO4 would help to reduce matrix interferences caused by chlorides, perchlorates and other matrix components in the sample, and an enhancement of about 50% in cadmium absorbance was achieved. When Na3PO4 was added, the atomic signal of cadmium in sea water occnrs prior to the background absorption. The analytical results obtained for cadmium in sea water are in agreement with the values obtained by anodic stripping voltammetry, and an average recovery of 94-103% was achieved. The re-commended method is rapid and reliable.
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  • 收稿日期:  1986-02-06
韩恒斌, 乐晓春, 倪哲明. 用磷酸钠作基体改进剂石墨炉原子吸收光谱法直接测定海水中痕量镉[J]. 环境化学, 1986, 5(6): 34-42.
引用本文: 韩恒斌, 乐晓春, 倪哲明. 用磷酸钠作基体改进剂石墨炉原子吸收光谱法直接测定海水中痕量镉[J]. 环境化学, 1986, 5(6): 34-42.
shu
Han Hengbin, Le Xiaochun, Ni Zheming. DETERMINATION OF CADMIUM IN SEA WATER BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY USING SODIUM PHOSPHATE AS A MATRIX MODIFIER[J]. Environmental Chemistry, 1986, 5(6): 34-42.
Citation: Han Hengbin, Le Xiaochun, Ni Zheming. DETERMINATION OF CADMIUM IN SEA WATER BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY USING SODIUM PHOSPHATE AS A MATRIX MODIFIER[J]. Environmental Chemistry, 1986, 5(6): 34-42.
shu

用磷酸钠作基体改进剂石墨炉原子吸收光谱法直接测定海水中痕量镉

  • 1. 中国科学院环境化学研究所
  • 收稿日期:  1986-02-06

摘要: 本文描述了用Na3PO4作基体改进剂低温原子化石墨炉原子吸收光谱直接测定海水中痕量镉的方法。用Na3PO4作改进剂能够提高镉的灵敏度、减小氯化物、高氯酸盐和海水样品基体的干扰,并使海水中镉在850℃低温原子化,从而与背景吸收信号相分离。采用本方法测定海水中0.077μg/L镉的结果与用阳极溶出伏安法(ASV)测定结果相一致,海水中镉的回收率为94—103%。该方法简便、可靠。

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