采用ICP-OES技术,采用多种消化方法对银角茶叶片进行定量元素分析

Anil G. Markandeya , Narayan P. Firke , Shirish S. Pingale , Sunita Salunke-Gawali
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引用次数: 13

摘要

目的用电感耦合等离子体发射光谱法(ICP-OES)定量测定青茶叶片中的常量营养素、微量营养素和有毒元素,并报道高效、可靠、环保的消化方法,以更好地回收这些元素。方法采用HNO3/HCl干灰化法、HNO3/HClO4和HNO3/H2O2湿消解法、HNO3/HClO4和HNO3/H2O2微波消解法研究5种消解方法。在径向和轴向观察下,结合射频功率、冲样时间和气体流量对ICP-OES工作参数进行优化。元素量化结果采用Kruskal-Wallis单因素方差分析(ANOVA)进行统计分析。青茶含有大量的镁、钙、硫、磷、钾和铁等常量营养素。灰化和微波消解法比湿消解法更可靠,回收率更高。与湿法消解法相比,灰分消解法和微波消解法对钙、铜、铁的回收率更高。有毒元素的浓度低于允许的限度。结论ICP-OES技术在各种消化方法下均能成功地定量出营养成分和有毒元素。干法和湿法消化与微波消化相比繁琐、耗时,更环保、更简单。Kruskal-Wallis检验可以用于非参数方法来比较两个以上的总体平均值,而不需要任何特定形式的总体分布。青茶可作为铁、镁、钙等矿物质缺乏的补充食品。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quantitative elemental analysis of Celocia argentea leaves by ICP-OES technique using various digestion methods

Aim

Quantification of macronutrient, micronutrient and toxic elements from the leaves of Celocia argentea by inductively coupled plasma-optical emission spectrometry (ICP-OES) and to report efficient, reliable, eco friendly method of digestion for better recovery of the elements.

Methods

The five digestion methods are studied included, dry ashing method with HNO3/HCl, wet digestion method with HNO3/HClO4 and HNO3/H2O2, microwave digestion with HNO3/HClO4 and HNO3/H2O2. ICP-OES operating parameter was optimized at radial and axial viewing along with the radio-frequency power, sample flush time and gas flow rate. The results of the elemental quantification were statistically analyzed using one way analysis of variance (ANOVA) by Kruskal–Wallis test.

Results

C. argentea exhibits good quantity of macronutrients like Mg, Ca S, P, K and Fe. The ashing and microwave digestion method were found to more reliable as compare to wet digestion method and hence recommended for better recovery. The element Ca, Cu and Fe gives better recovery by ash and microwave digestion method as compare to wet digestion method. Toxic elements show their concentration below permissible limit.

Conclusion

All the nutrients as well as toxic elements are quantified successfully by ICP-OES technique by all methods of digestion. Dry and wet digestion methods are tedious and time consuming compare to microwave digestion method, which is greener and simpler. Kruskal–Wallis test can be employed for non-parametric methods to compare more than two population average which do not require any specific form of the distribution of the population. The C. argentea can be used as supplementary food for deficiency of minerals like Fe, Mg and Ca.

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