Department of Food Engineering, Hacettepe University, Beytepe 06800, Ankara, Turkey.
Hitit University Scientific Technique Application and Research Center, North Campus, Corum 19030, Turkey.
Food Chem. 2018 Oct 30;264:142-148. doi: 10.1016/j.foodchem.2018.05.037. Epub 2018 May 5.
Coffee is globally one of the most widely consumed beverages. Due to the high economic importance for the countries that produce, export and import it, its purity and detection of external impurities have been constant concern. In some cases, visual inspection is unreliable in roasted ground coffee because of resemblance in color and the texture of the cheapest fillers. The objective of this work was to evaluate the feasibility of employing Laser Induced Breakdown Spectroscopy (LIBS) for determination of coffee adulteration with chickpea, corn and wheat. For this purpose, LIBS spectra was evaluated with chemometrics methods for classification and quantification of the adulteration ratio. Coefficient of determination and limit of detection values for chickpea, corn and wheat adulteration with Coffee arabica were found as 0.996, 0.995, 0.995 and 0.56%, 0.52% and 0.45%, respectively. With LIBS, prevention of unfair competition, protection of consumers and determination of coffee quality can be achieved.
咖啡是全球范围内最广泛饮用的饮料之一。由于对生产、出口和进口咖啡的国家具有很高的经济重要性，因此其纯度和外部杂质的检测一直是人们关注的焦点。在某些情况下，由于颜色和最廉价填充物的质地相似，烤磨碎咖啡的视觉检查不可靠。这项工作的目的是评估激光诱导击穿光谱（LIBS）用于检测咖啡中混入鹰嘴豆、玉米和小麦的可行性。为此，采用化学计量学方法对 LIBS 光谱进行了评估，以对掺假比例进行分类和定量。对于阿拉比卡咖啡中混入鹰嘴豆、玉米和小麦的检测，发现决定系数和检测限分别为 0.996、0.995、0.995 和 0.56%、0.52%和 0.45%。通过 LIBS 可以防止不公平竞争、保护消费者并确定咖啡的质量。
