超声浸提-电感耦合等离子体发射光谱法测定石灰性土壤中的有效磷  

Determination of Avaiable Phosphorus in Calcareous Soil by Inductively Coupled Plasma Emission Spectrometry with Ultrasonic Extraction

作　　者：杨青 孙晓慧[1] 黄尧[1] 季佩高 李亮 YANG Qing;SUN Xiaohui;HUANG Yao;JI Peigao;LI Liang(The 6th Geological Institute of Jiangsu Province,Lianyungang 222023,Jiangsu China)

机构地区：[1]江苏省地质矿产局第六地质大队,江苏连云港222023

出　　处：《分析测试技术与仪器》2024年第3期196-202,共7页Analysis and Testing Technology and Instruments

基　　金：江苏省地质局科技创新项目(2023KY09)。

摘　　要：采用超声浸提-电感耦合等离子体发射光谱法(ICP-AES)实现了石灰性土壤中有效磷的快速、准确、批量化分析要求.将水土混合液在400 W超声功率下于25℃浸提10 min,用3.50 g苯乙烯阳离子交换树脂降低基体干扰.分析谱线P 214.914 nm,射频功率1150 W,载气流量0.6 L/min,采用ICP-AES测定有效磷.结果显示:磷在0~5.00 mg/L范围内校准曲线线性良好(相关系数0.9996),检出限为0.072 mg/kg.方法用于4种不同碱性土壤有效态标准物质的分析,测定值相对误差小于±7%,相对标准偏差小于10%,且和标准方法(NY/T 1121.7—2014)测定值接近.The inductively coupled plasma emission spectrometry(ICP-AES)with ultrasonic extraction method was used to achieve the fast,accurate and massive analysis of available phosphorus in calcareous soil.The mixture was extracted at 25℃for 10 min at ultrasonic power of 400 W,and 3.50 g styrene cation exchange resin was used to reduce matrix interference.The available phosphorus was determined by ICP-AES at the analyzed spectral line of P 214.914 nm,radio frequency power of 1150 W and carrier gas flow rate of 0.6 L/min.The results showed that the calibration curve was linear(correlation coefficient of 0.9996)when the concentration of phosphorus was 0~5.00 mg/L,and the limit of detection was 0.072 mg/kg.The method was used to analyze the available state stardand materials in 4 different alkaline soils,the relative error were less than±7%,the relative standard deviation were less than 10%,and it were close to the measured values of standard method(NY/T 1121.7—2014).

关 键 词：超声浸提 电感耦合等离子体发射光谱法 石灰性土壤 有效磷 苯乙烯阳离子交换树脂 

分 类 号：O657.31[理学—分析化学]