National Research Council Canada, Metrology, 1200 Montreal Rd., Ottawa, ON K1A 0R6, Canada.
Food Chem. 2019 Dec 1;300:125106. doi: 10.1016/j.foodchem.2019.125106. Epub 2019 Jul 2.
Over 200 sugars, high sugar content foods, and sugar-free alternative products found in Canadian supermarkets were analyzed for carbon isotope (δC) values, adding to the record of food items with reported δC values, which can aid in food authentication and human diet studies. The δC values of the products were mostly consistent with the photosynthetic pathway of the plant from which the main ingredients were derived. With the exception of those sugars and syrups derived from known C3 sources, all of the sugars and syrups and most of the sugar added to food products were from C4 plants such as sugar cane or corn syrup. Many sweeteners are chemically manufactured, and most reflect an intermediate δC value. A mixing model estimated the contribution of C3- and C4-based ingredients in foods with high sugar content, which may be used to evaluate the percentage of added sugar from C3- or C4-sources.
对加拿大超市中 200 多种糖、高糖食品和无糖替代品进行了碳同位素（δC）值分析，这些食品的 δC 值记录增加了，这有助于食品鉴定和人类饮食研究。这些产品的 δC 值与主要成分所来源的植物的光合作用途径大多一致。除了那些来自已知 C3 来源的糖和糖浆外，所有的糖和糖浆以及大多数添加到食品中的糖都来自 C4 植物，如甘蔗或玉米糖浆。许多甜味剂是化学制造的，大多数反映出中间的 δC 值。混合模型估计了高糖食品中基于 C3 和 C4 成分的贡献，这可用于评估来自 C3 或 C4 来源的添加糖的百分比。
