Laser-induced breakdown spectroscopy for rapid accurate analysis of Mg, Ca, and K in edible sea salts

Kim Hyang; Ngo Van Tho; Kumar Sandeep; Lee Won; Park Jeong; Han Song-Hee; Nam Sang-Ho; Ham Kyung-Sik; Lee Yonghoon

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Laser-induced breakdown spectroscopy for rapid accurate analysis of Mg, Ca, and K in edible sea salts

机译：激光诱导的击穿光谱，用于快速准确分析Mg，CA和K中的可食用海盐中的K.

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A compact laser-induced breakdown spectroscopy (LIBS) instrument and a simple sample preparation method were developed for rapid on-site analysis of Mg, Ca, and K in edible sea salt products. The LIES instrument was assembled using a small diode-pumped solid-state laser and a handheld spectrometer. Aqueous solutions of salts were prepared and sampled by using pieces of filter papers. The dried filter paper was attached on the flat surface of a silicon wafer and then analyzed by LIBS. Calibration curves were obtained using binary mixtures of NaCl-MgSO4, NaCl-CaCl2, and NaC-KCl and used to estimate the concentrations of Mg, Ca, and K in 13 edible sea salt products. Matrix effects on the results from LIBS were identified in comparison with those from inductively coupled plasma optical emission spectroscopy. This indicates that the matrix of sea salt samples is significantly different from that of the binary mixture standards. The sea salts with known concentrations of Mg, Ca, and K were employed to match the matrices of samples and standards. This improved analysis accuracy remarkably. Furthermore, an alternative indirect method for estimating the concentration of K was suggested on the basis of the strong positive correlations observed between the concentrations of Mg and K in the sea salt samples. (C) 2019 Optical Society of America

机译：一种紧凑的激光诱导的击穿光谱（LIBS）仪器和简单的样品制备方法是为了快速现场分析Mg，Ca和K中的可食用海盐产品。使用小型二极管泵浦固态激光器和手持光谱仪组装套管仪器。通过使用过滤纸，制备和取样盐水溶液和取样。干燥的滤纸附着在硅晶片的平坦表面上，然后通过Libs分析。使用NaCl-MgSO 4，NaCl-CaCl 2和NaC-KCl的二元混合物获得校准曲线，并用于估计13个可食用海盐产物中Mg，Ca和K的浓度。与来自电感耦合等离子体光发射光谱的那些相比，鉴定了对Libs结果的基质效应。这表明海盐样品的基质与二元混合物标准的基质显着不同。采用已知浓度Mg，Ca和K的海盐与样品和标准的基质相匹配。这种显着提高了分析准确性。此外，基于在海盐样品中的Mg和K浓度与K之间观察到的强正相关性，提出了一种替代的间接间接方法。（c）2019年光学学会

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《Applied optics》 |2019年第36期|共9页
作者
Kim Hyang; Ngo Van Tho; Kumar Sandeep; Lee Won; Park Jeong; Han Song-Hee; Nam Sang-Ho; Ham Kyung-Sik; Lee Yonghoon;
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Mokpo Natl Univ Departmentof Chem Muan 58554 Jeonnam South Korea;

Mokpo Natl Univ Departmentof Chem Muan 58554 Jeonnam South Korea;

Mokpo Natl Univ Departmentof Chem Muan 58554 Jeonnam South Korea;

Mokpo Natl Univ Departmentof Chem Muan 58554 Jeonnam South Korea;

Mokpo Natl Univ Departmentof Chem Muan 58554 Jeonnam South Korea;

Mokpo Natl Maritime Univ Div Nav Sci Mokpo 58628 Jeonnam South Korea;

Mokpo Natl Univ Departmentof Chem Muan 58554 Jeonnam South Korea;

Mokpo Natl Univ Dept Food Engn Muan 58554 Jeonnam South Korea;

Mokpo Natl Univ Departmentof Chem Muan 58554 Jeonnam South Korea;

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Laser-induced breakdown spectroscopy for rapid accurate analysis of Mg, Ca, and K in edible sea salts

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