沸水浸提-电感耦合等离子体发射光谱法测定土壤中的有效硼  

Determination of Available Boron in Soil by ICP-OES With Boiling Water Extraction

作　　者：张鹏鹏 胡梦颖 徐进力[1,2] 陈卫明 顾雪[1,2] 张灵火 白金峰 张勤 ZHANG Peng-peng;HU Meng-ying;XU Jin-li;CHEN Wei-ming;GU Xue;ZHANG Ling-huo;BAI Jin-feng;ZHANG Qin(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China;Key Laboratory of Geochemical Exploration,Ministry of Natural Resources,Langfang 065000,China)

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [2]自然资源部地球化学探测重点实验室,河北廊坊065000

出　　处：《光谱学与光谱分析》2021年第6期1925-1929,共5页Spectroscopy and Spectral Analysis

基　　金：中国地质调查局地质调查项目(DD20190518);基本科研业务费专项资金项目(AS2020J04)资助。

摘　　要：土壤中有效硼测定对评价土壤有效硼供应水平具有重要意义,土壤中有效硼含量的高低直接影响植物的生长过程,因此如何提取和测定有效硼的含量至关重要。然而传统的沸水浸提-姜黄素比色法和沸水浸提-亚甲胺比色法前处理部分流程长、速度慢和使用试剂较多且不易操作,检测结果容易造成较大的误差,随着土地质量地球化学调查、生态地球化学调查和农业地质调查项目工作的开展,该方法已经不能满足大批量及快速测定土壤样品的要求。采用沸水浸提土壤中的有效硼,浸提液采用电感耦合等离子体发射光谱测定,主要是从密闭和敞开环境浸提、最佳浸提时间、测定过程中谱线的干扰和不同的土壤类型进行实验的对比研究,优选出适合分析土壤中有效硼的实验条件。结果表明:不同类型的土壤中有效硼在敞开环境条件下,沸水浸提10 min中,测量值与标准物质推荐值最接近,在测定过程中,由于沸水浸提出的铁的含量较低,对测定有效硼的含量基本无影响。该方法的检出限为0.0049μg·g^(-1),测定结果的相对标准偏差(RSD,n=12)均小于9%,准确度经12个国家一级土壤有效态成分分析标准物质验证,测定结果与推荐值相符。沸水浸提-电感耦合等离子体发射光谱法前处理操作简单、流程短、检测快速,分析结果准确可靠,避免样品处理过程中的硼污染,且一次可浸提几十个土壤样品,大大提高了分析效率,适合于土壤中有效硼含量的测定。The determination of available boron in soil is of great significance to evaluate the supply level of available boron in the soil.The content of available boron in the soil directly affects the growth process of plants,so how to extract and determine the content of available boron is very important.However,the traditional methods of boiling water extraction curcumin colorimetry and boiling water extraction methylene amine colorimetry have a long process and slow speed,which can not meet the requirements of large-scale and rapid determination of soil samples.In this study,the available boron in soil was extracted by boiling water,and the extraction solution was determined by inductively coupled plasma atomic emission spectrometry.The main purpose of this study is to compare the extraction in a closed and open environment,the best extraction time,the interference of spectral lines in the determination process and different soil types,and to optimize the conditions suitable for analyzing the available boron in soil.The results showed that the available boron in different types of soil was the closest to the certified value of reference material in the boiling water extraction for 10 minutes under the open environment.In the determination process,the content of iron raised by the boiling water extraction was relatively low,which had no effect on the content of available boron.The detection limit of this method is 0.0049μg·g^(-1),and the RSD of the results is less than 9%.The accuracy of the method is verified by 12 national standard materials for the analysis of effective soil components,and the results are consistent with the recommended values.Boiling water extraction inductively coupled plasma atomic emission spectrometry(ICP-OES)has the advantages of simple operation,short process,fast detection,accurate and reliable analysis results,avoiding boron pollution in the process of sample treatment.It can extract dozens of soil samples at a time,greatly improving the analysis efficiency,and is suitable for the determ

关 键 词：有效硼 沸水浸提 电感耦合等离子体发射光谱法 土壤 

分 类 号：O657.31[理学—分析化学]