偏硅酸检测方法研究进展

Research progress on determination methods for metasilicic acid

中文关键词:  偏硅酸  天然矿泉水  检测方法

英文关键词:metasilicic acid  drinking water  determination methods

中文摘要:

      硅是对人体有益的重要微量元素, 一般以偏硅酸的形态存于水中。偏硅酸是天然矿泉水的重要界限指标, 其检测的准确性关系到天然矿泉水品质的合格判定。GB 8538—2022《食品安全国家标准 饮用天然矿泉水检验方法》中规定了硅钼黄和硅钼蓝两种基于分光光度技术的偏硅酸检测方法, 受光谱分析比色液稳定性、吸收波长差异等因素的影响, 这两种方法在偏硅酸检测中的应用仍存在需要改进提升的问题。除国家标准规定的检测方法外, 一些学者也报道了基于流动注射(flow injection, FI)、电感耦合等离子发射光谱(inductively coupled plasma optical emission spectrometry, ICP-OES)、电感耦合等离子体质谱(inductively coupled plasma mass spectrometry, ICP-MS)、离子色谱(ion chromatography, IC)、高效液相色谱(high performance liquid chromatography, HPLC)等技术的偏硅酸检测方法。本文对比分析了多种检测方法的优缺点和检测操作中存在的问题, 为偏硅酸检测方法的改进和新方法的开发提供参考。

英文摘要:

      Silicon is an essential trace element for the human body and generally exists in mineral water in the form of metasilicic acid. The accurate detection of metasilicic acid, a crucial boundary indicator for natural mineral water, is essential for determining compliance within quality standards. The GB 8538—2022 China national food safety standard—Testing methods for natural mineral drinking water specifies 2 kinds of spectrophotometric techniques, the silicomolybdic yellow method and the silicomolybdic blue method, for the detection of metasilicic acid. However, due to factors such as the stability of colorimetric solutions in spectroscopic analysis and differences in absorption wavelengths, the application of these 2 kinds of methods in metasilicic acid detection still presents issues that require further improvement. Researchers have also reported a number of determination methods for metasilicic acid based on different technologies, such as flow injection (FI), inductively coupled plasma optical emission spectrometry (ICP-OES), inductively coupled plasma mass spectrometry (ICP-MS), ion chromatography (IC), high performance liquid chromatography (HPLC). This article compared the advantages and existing problems of these methods, so as to provide references for the improvement of existing methods and the development of new methods for metasilicic acid determination.