采用有效顶空气相色谱法测定土壤和污泥中的总磷。
Determination of total phosphorus in soil and sludge by an effective headspace gas chromatographic method.
作者信息
Zheng Yukai, Fu Weide, Zhu Rencheng, Hu Zhanbo, Chen Gang, Chai Xin-Sheng
机构信息
School of Resource, Environment and Material, Guangxi University Nanning China
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology Guangzhou China.
出版信息
RSC Adv. 2019 Dec 11;9(70):40961-40965. doi: 10.1039/c9ra07228d. eCollection 2019 Dec 9.
This paper reported a novel method for the determination of total phosphorus (TP) content in soil and sludge by a headspace gas chromatography (HS-GC) method. It was based on a reaction between the soluble phosphate in the digestion solution and calcium oxalate solid to form a calcium phosphate precipitate and release oxalate ions, which can react with permanganate to form carbon dioxide, which was then measured by HS-GC. The results showed the complete conversion of phosphate (meanwhile to free oxalate ions in calcium oxalate) in 15 min at 60 °C. The present method has good repeatability (RSD < 2.6%) and good accuracy (RD < 7.3%) compared to the reference method. Therefore, the present HS-GC method can become a more effective method for determining the TP content in soil and sludge samples.
本文报道了一种采用顶空气相色谱法（HS-GC）测定土壤和污泥中总磷（TP）含量的新方法。该方法基于消解液中的可溶性磷酸盐与草酸钙固体反应，形成磷酸钙沉淀并释放草酸根离子，草酸根离子可与高锰酸盐反应生成二氧化碳，然后通过顶空气相色谱法进行测定。结果表明，在60℃下15分钟内磷酸盐可完全转化（同时转化为草酸钙中的游离草酸根离子）。与参考方法相比，本方法具有良好的重复性（RSD<2.6%）和良好的准确性（RD<7.3%）。因此，本顶空气相色谱法可成为测定土壤和污泥样品中总磷含量的更有效方法。
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