微波消解-石墨炉原子吸收光谱法测定土壤中铅和镉

来源 :环境与职业医学 | 被引量 : 0次 | 上传用户:elong_ctu
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
[目的]建立微波消解-石墨炉原子吸收光谱测定土壤中铅和镉的分析方法。[方法]土壤样品研磨过100目筛,用硝酸-氢氟酸-过氧化氢混合消解液微波消解后,石墨炉原子吸收光谱测定。[结果]铅浓度为5.0~40.0μg/L、镉浓度为0.20~2.00μg/L时,石墨炉原子吸收光谱测定土壤中铅和镉的方法线性良好,相关系数均为0.9999。铅和镉的方法定量检出限分别为5.0、0.040mg/kg。加标回收率为90.0%~110.0%,相对标准偏差为4.1%~6.9%,标样的测定结果在不确定度范围内。[结论]该方法简便、快速,基体干扰少,结果准确,适用于土壤中铅、镉含量的测定。 [Objective] The research aimed to establish a method for the determination of Pb and Cd in soil by microwave digestion and graphite furnace atomic absorption spectrometry. [Method] The soil samples were ground through a 100 - mesh sieve and determined by graphite furnace atomic absorption spectrometry after microwave digestion with nitric acid - hydrofluoric acid - hydrogen peroxide mixed digestion solution. [Result] The results showed that the determination of lead and cadmium in soil by graphite furnace atomic absorption spectrometry was good with the concentrations of lead ranging from 5.0 to 40.0 μg / L and the concentrations of cadmium ranging from 0.20 to 2.00 μg / L. The correlation coefficients were both 0.9999. The detection limits of lead and cadmium were 5.0 and 0.040 mg / kg, respectively. The spiked recoveries ranged from 90.0% to 110.0% and the relative standard deviations (RSDs) ranged from 4.1% to 6.9%. The results of standard samples were within the range of uncertainty. [Conclusion] The method is simple, rapid, less matrix interference and accurate. It is suitable for the determination of lead and cadmium in soil.
其他文献
本研究利用2013~2018年丽水空气质量、健康及气象等官方数据,采用半参数广义可加模型分析了丽水市空气质量状况与人群健康效应之间的关系.结果表明:(1)大气污染物可导致人群
针对北京市设施蔬菜生产园区对水肥管理装备技术的需求,引进建设了固液混合水肥管理系统,实现了水肥管理调控的自动化、数据化和精准化,提高了园区劳动生产效率,实际应用中每
分娩疼痛会导致产妇交感神经兴奋,血中促肾上腺皮质激素、儿茶酚胺类等物质的释放增加,导致产程延长及胎儿宫内窘迫等不良后果。病人自控硬膜外麻醉(PCEA)是一种较为有效而安全的
以晋煤集团寺河矿西井区W1301综采工作面回采为背景,采用数值模拟和现场监测的方法对工作面侧向护巷煤柱的合理宽度进行了分析。数值模拟结果表明,当煤柱宽度为25~30 m时,能
为了分析厚关键层下突出煤层煤岩瓦斯卸压规律,确保突出煤层安全高效回采,采用数值模拟的方法分析了厚关键层下保护层开采对上覆被保护突出煤层的应力卸压规律。研究表明,随
为了提高立井井筒投点点位精度,把地面坐标系统中的平面坐标传递到井下,在地面井口附近设立作为定向时与垂线连接的点,井下定向水平采用单重摆动投点和标尺相结合的观测方法,