中国农业科技导报2025，Vol.27Issue(11)：240-249,10.DOI:10.13304/j.nykjdb.2024.0490
HDXRF法快速测定水稻土Cd含量的精准度评价与检测条件分析
Accuracy Evaluation and Analysis of Detection Conditions for Rapid Determination of Cd Content in Paddy Soil by HDXRF Method
摘要
Abstract
In order to evaluate the feasibility of high-definition X-ray fluorescence spectrometry(HDXRF)in the rapid analysis and investigation of excessive Cd in paddy fields,the national standard soil materials and Cd-exceeding paddy fields in central Guizhou was used as the research objects.The relative error(RE)and relative standard deviation(RSD)were used to evaluate the accuracy of HDXRF method for the determination of Cd content in soil.The difference between HDXRF method and(inductively coupled plasma source mass spectrometer ICP-MS)method for the determination of Cd content in paddy soil was studied,and the effects of sample preparation and test conditions such as soil moisture,sieve particle size and detection time on the determination of Cd content in paddy soil by HDXRF method were analyzed.The results showed that the lower limit of determination of Cd in soil by HDXRF method was 0.254 mg·kg-1,which was lower than the minimum screening value(0.3 mg·kg-1)of Cd in Soil Environmental Quality Agricultural Land Soil Pollution Risk Control Standard(Trial)(GB 15618-2018).When the soil Cd content was higher than the lower limit of determination(0.254 mg·kg-1),the accuracy and precision of HDXRF method for the determination of soil Cd content were higher(<10%).There was no significant difference in Cd content in paddy soil by HDXRF method and ICP-MS method.The fitting equation of soil Cd content determined by these 2 methods was y=0.981x+0.006(R2=0.998).With the increase of soil moisture content,the RE and RSD of Cd content in paddy soil by HDXRF method showed an increasing trend.There was no significant difference in Cd content between 2.5%(air-dried)soil moisture content and 0%(oven-dried)soil moisture content.With the decrease of soil sieve particle size,the RE and RSD of Cd content in paddy soil by HDXRF method decreased.When the sieve particle size was 0.15 mm,the variation range of Cd content in paddy soil by HDXRF method was the smallest,and both RE and RSD were less than 10%.With the increase of detection time,the RE and RSD of Cd content in paddy soil by HDXRF method showed a decreasing trend.When the detection time was 10 min,the RE and RSD of Cd content in paddy soil by HDXRF method were less than 10%.In summary,HDXRF method was suitable for rapid analysis and investigation of Cd exceeding standard in paddy fields.The suitable sample preparation and test conditions were soil moisture content of 2.5%,sieve particle size of 0.15 mm and detection time of 10 min.关键词
土壤Cd/快速检测/准确度/精密度/影响因素Key words
soil Cd/rapid detection/accuracy/precision/influencing factors分类
环境科学引用本文复制引用
柴冠群,田茂苑,蔡景行,吴道明,陈开富,赵苗苗,范成五..HDXRF法快速测定水稻土Cd含量的精准度评价与检测条件分析[J].中国农业科技导报,2025,27(11):240-249,10.基金项目
贵州省科技计划项目(黔科合基础-[2024]青年074号) （黔科合基础-[2024]青年074号）
贵州省土壤肥料研究所技术储备项目(黔土肥技术[2022]13号). （黔土肥技术[2022]13号）
