湖北农业科学 ›› 2019, Vol. 58 ›› Issue (10): 142-145.doi: 10.14088/j.cnki.issn0439-8114.2019.10.033

• 检测分析 • 上一篇    下一篇

微波消解-火焰光度法测定植物中全钾

陶曙华1,2, 龚浩如1,2, 陈祖武1,2, 陈英姿1,2, 苗雪雪1,2, 王洁敏1,2   

  1. 1.湖南省水稻研究所,长沙 410125;
    2.农业部长江中下游遗传育种重点实验室,长沙 410125
  • 收稿日期:2018-08-16 出版日期:2019-05-25 发布日期:2019-12-03
  • 作者简介:陶曙华(1970-),女,湖南安化人,高级实验师,主要从事土壤与农产品质量安全检测工作,(电话)13755180146(电子信箱)tao_sh_sds@163.com。
  • 基金资助:
    国家重点研发计划项目(2018YFD0301003)

Determination of total potassium in plants samples by microwave digestion-flame photometry

TAO Shu-hua1,2, GONG Hao-ru1,2, CHEN Zu-wu1,2, CHEN Ying-zi1,2, MIAO Xue-xue1,2, WANG Jie-min1,2   

  1. 1.Hunan Rice Reserch Institute,Changsha 410125,China;
    2.Key Laboratory of Genetics and Breeding of Middle and Lower Yangtze River,MOA China,Changsha 410125,China
  • Received:2018-08-16 Online:2019-05-25 Published:2019-12-03

摘要: 通过优化微波消解用酸种类、最高温度及保持时间等条件,建立微波消解-火焰光度计测定植物中全钾的新方法。结果表明,采用6 mL HNO3+2 mL H2O2酸系,微波消解最高温度160 ℃,保持时间15 min的优化消解方法,测定的检出限0.002 mg/g;测定两种植物标准物质的全钾含量均在其证书标准值范围内;测定水稻植株样品的全钾含量加标回收率97.5%~103.0%,相对标准偏差0.63%~2.27%。该方法适用于植物不同部位全钾的测定,操作简便安全,结果准确可靠。

关键词: 微波消解, 火焰光度法, 植物, 全钾

Abstract: A new method for the determination of total potassium in plants by microwave digestion-flame photometry was established by optimizing the conditions of digested acid, maximum digestion temperature and retention time of microwave digestion. The results showed that the optimal digestion condition was as follows:6 mL HNO3+2 mL H2O2 acid system, maximum digestion temperature 160 ℃ and retention time 15 min, and the detection limit was 0.002 mg/g. The results of the total potassium content of two plant reference materials determined by the optimal digestion procedure showed that the data was within the range of the certificate standard values. The recovery rates of total potassium contents of rice plant samples tested by the optimal digestion procedure were 97.5%~103.0% and the relative standard deviation was 0.63%~2.27%. The results suggested that this method is suitable for the determination of total potassium in different parts of plants, and the operation is simple and safe, and the result is accurate and reliable.

Key words: microwave digestion, flame photometry, plant, total potassium

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