摘要
确定香砂中金属元素的微波消解-电感耦合等离子体发射光谱法测定方法。首先探究了香砂整果、皮、籽的微波消解条件,然后测定其中金属元素的含量。结果表明:香砂果的最佳消解条件为6 mL硝酸、3 mL过氧化氢,程序消解温度为140,160,180℃和时间为10,15,20 min;香砂皮的最佳消解条件为6 mL硝酸、3 mL过氧化氢,程序消解温度为140,160,180℃和时间为5,15,20 min;香砂籽的最佳消解条件为4 mL硝酸、1 mL过氧化氢,程序消解温度为120,140,160℃和时间为5,10,20 min,香砂果、皮、籽中钾、钠、钙、镁、铁、铜、锌、锰、锶、铬、铅的含量范围分别为16.66~19.27 mg/g,1.33~1.49 mg/g,13.03~14.86 mg/g,2.71~3.77 mg/g,45.36~59.20 mg/kg,19.90~42.70 mg/kg,28.00~102.90 mg/kg,55.20~62.30 mg/kg,12.60~52.51 mg/kg,1.64~2.40 mg/kg,1.85~2.40 mg/kg,相对标准偏差为1.08%~4.89%,各元素的加标回收率为93.3%~105.0%。因此,该方法简单、快捷、准确,可同时检测香砂各部分样品中的多种元素。
A method for the determination of metal elements in Xiangsha by microwave digestion-inductively coupled plasma emission spectrometry is established.Firstly,the microwave digestion conditions of whole fruit,peel and seed of Xiangsha are studied,and then the content of metal elements is determined.The results show that the optimal digestion conditions for Xiangsha fruit are 6 mL nitric acid and 3 mL hydrogen peroxide,the digestion temperature is 140,160,180℃and time is 10,15,20 min;the optimal digestion conditions for Xiangsha peel are 6 mL nitric acid and 3 mL hydrogen peroxide,the digestion temperature is 140,160,180℃and time is 5,15,20 min;the optimal digestion conditions for Xiangsha seed are 4 mL nitric acid and 1 mL hydrogen peroxide,and the digestion temperature is 120,140,160℃and time is 5,10,20 min.The content of potassium,sodium,calcium,magnesium,iron,copper,zinc,manganese,strontium,chromium and lead is 16.66~19.27 mg/g,1.33~1.49 mg/g,13.03~14.86 mg/g,2.71~3.77 mg/g,45.36~59.20 mg/kg,19.90~42.70 mg/kg,28.00~102.90 mg/kg,55.20~62.30 mg/kg,12.60~52.51 mg/kg,1.64~2.40 mg/kg,1.85~2.40 mg/kg respectively,the relative standard deviation is 1.08%~4.89%,and the recovery rate is 93.3%~105.0%.Therefore,this method is simple,rapid and accurate,and can simultaneously detect various elements in each part of Xiangsha sample.
作者
曹叶霞
李慧卿
尹爱萍
CAO Ye-xia;LI Hui-qing;YIN Ai-ping(Xinzhou Teachers University,Xinzhou 034000,China)
出处
《中国调味品》
CAS
北大核心
2022年第1期176-179,216,共5页
China Condiment
基金
山西省1331工程重点学科建设计划经费资助。
关键词
电感耦合等离子体发射光谱法
香砂
微波消解
金属元素
inductively coupled plasma emission spectrometry
Xiangsha
microwave digestion
metal elements
