Bioimaging of the elemental distribution in cocoa beans by means of LA-ICP-TQMS,Journal of Analytical Atomic Spectrometry

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Bioimaging of the elemental distribution in cocoa beans by means of LA-ICP-TQMS
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2017-12-18 00:00:00 , DOI: 10.1039/c7ja00354d
Georgina M. Thyssen _{1,

2,

3,

4} , Claudia Keil _{4,

5,

6,

7} , Melanie Wolff _{4,

5,

6,

7} , Michael Sperling _{1,

2,

3,

4,

8} , Daniel Kadow _{4,

9,

10,

11} , Hajo Haase _{4,

5,

6,

7} , Uwe Karst _{1,

2,

3,

4}

Affiliation

Cocoa beans (Theobroma cacao L.) are a key raw material for the confectionary industry. Therefore, their ingredients, nutrients as well as contaminants, have to be thoroughly analysed. In this work, a method for spatially resolved analysis of the tissue specific nutrient and contaminant distribution in cocoa beans by laser ablation-inductively coupled plasma-triple quadrupole mass spectrometry (LA-ICP-TQMS) is presented. This method provides high spatial resolution for fine structures and a wide linear range to detect macronutrients and lower concentrated toxic elements – such as Cd – in a single experiment. By using a triple quadrupole analyser, elements that are subject to isobaric or polyatomic interferences in ICP-MS analysis, such as Ca or Fe, can also be determined accurately. The distribution of Na, Mg, P, K, Ca, Fe, Cu, Zn, Cd and Pb in cocoa beans was successfully visualized for the first time. The method represents a new approach for studying contaminants in cocoa beans and ultimately the development of innovative strategies to minimize contamination in the product.

中文翻译：

通过LA-ICP-TQMS对可可豆中元素分布的生物成像

可可豆（可可可可L.）是糖果业的关键原料。因此，必须彻底分析其成分，营养成分和污染物。在这项工作中，提出了一种通过激光烧蚀-电感耦合等离子体三重四极杆质谱（LA-ICP-TQMS）对可可豆中的组织比养分和污染物分布进行空间分辨分析的方法。这种方法可为精细结构提供高空间分辨率，并在宽范围的线性范围内进行一次实验，以检测大量营养素和较低浓度的有毒元素（例如Cd）。通过使用三重四极杆分析仪，还可以准确确定ICP-MS分析中受等压或多原子干扰的元素，例如Ca或Fe。Na，Mg，P，K，Ca，Fe，Cu，Zn的分布首次成功地可视化了可可豆中的Cd和Pb。该方法代表了一种研究可可豆中污染物的新方法，并最终开发了将产品中的污染物降至最低的创新策略。

更新日期：2017-12-18

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