高压密闭消解处理草酸 - 草酸铵浸提剂方法的改进
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(甘肃省有色金属地质勘查局张掖矿产勘查院,甘肃 张掖 734000)

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任冬(1989-),男,甘肃张掖市人,实验室助理工程师,

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Improvement on the treatment of oxalic acid-ammonium oxalate extractant by high pressure closed digestion
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(Zhangye Geo-mine Survey Instisute of Non-ferrous Metal Geological Exploration Bureau ,Gansu Zhangye 734000)

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    摘要:

    采用高压密闭消解处理草酸 -草酸铵浸提剂后,能充分破坏草酸盐及有机质,用酸量小,样品空白值

    Abstract:

    Oxalate and organic matter can be fully destroyed by high-pressure sealed digestion of oxalic acid-ammonium oxalate leaching agent.The method is safe and reliable,the amount of acid used is little,and the blank value of the sample is low,and it can effectively prevent sample pollution and the volatilization loss.Soil samples were leached by oxalic acid-ammonium oxalate,the supernatant was absorbed in a high-pressure sealed digestion tank,treated by electric heating plate,and then added 2 mL concentrated nitric acid.The soil samples were kept in an oven at 180℃ for at least 3 hours,then the concentration of effective molybdenum was determined by ICP-MS.The detection limit(3 s)was 0.014μg/g and RSD(n=12)was 4.4%~7.6%.The method has been verified by the national first-class reference material and compared with the NY / T1121 method.The data are in good agreement.The method is feasible and suitable for batch sample analysis.

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任冬,刘彤彤,刘安安,钱银娣.高压密闭消解处理草酸 - 草酸铵浸提剂方法的改进[J].中国土壤与肥料,2019,(3):198-201.

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  • 收稿日期:2018-07-02
  • 最后修改日期:
  • 录用日期:2018-09-27
  • 在线发布日期: 2019-06-26
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