摘要
测定不同产地牡丹皮及种植土壤中的重金属铅、镉含量,并分析牡丹皮与种植土壤中铅、镉含量的相关性。从安徽和山东产地采样,通过硝酸-过氧化氢-氢氟酸体系进行牡丹皮和种植土壤微波消解,用石墨炉原子吸收光谱法(GFAAS)测定牡丹皮和种植土壤中铅、镉含量。Pb元素在0—60μg/L范围内线性关系良好,回收率为102.35%,精密度RSD为1.6%;Cd元素在0—4μg/L范围内线性关系良好,回收率为99.85%,精密度RSD为0.7%。不同产地牡丹皮均检出重金属元素铅和镉,铅含量偏低、镉含量偏高;种植土壤中的铅、镉含量比较高,大约是牡丹皮的6—7倍。该方法具有分析速度快、测定结果的精确度和精密度高等特点。种植土壤存在着重金属污染现象,为确保药材质量,保护环境、保护药材种植土壤是非常必要的。
The contents of heavy metal elements lead and cadmium in cortex moutan and its planting soil from different producing areas were determined ,and the correlations of lead and cadmium contents in cortex moutan and its planting soil were analyzed. The samples were collected from Anhui and Shangdong,and cortex moutan and its planting soil were digested by microwave with nitric acid- hydrogen peroxide-hydrofluoric acid system, and the contents of lead and cadmium in cortex moutan and its planting soil were determined by graphite furnace atomic absorption spectrometry（GFAAS）. There was a good linear relationship for lead in the range of O--60μg/L,recovery was 102.35% with RSD of 1.6% ,and cadmium had a good linear relationship from 0 to 4μg/L,recovery was 99.85% with RSD of 0. 7%. Lead and cadmium were both detected in cortex moutan samples from different producing areas, with low content of lead and high content of cadmium, and contents of lead and cadmium in planting soil were approximately 6-7 times those of cortex moutan. GFAAS has rapid analysis, accurate results and high precision. The planting soil is polluted by heavy metals. In order to ensure the quality of medicinal materials, it is necessary to protect the environment and the planting soil of medicinal materials.
出处
《光谱实验室》
CAS
2013年第2期821-824,共4页
Chinese Journal of Spectroscopy Laboratory
关键词
牡丹皮
微波消解
石墨炉
原子吸收光谱法
铅
镉
Cortex Moutan
Microwave Digestion
Graphite Furnace
Atomic AbsorptionSpectrometry
Lead
Cadmium
