This invention relates to a method to authenticate an item comprising:combining a chelated compound with the item and thereafter detecting the presence of the chelated compound, wherein the chelated compound is present at 10 ppb to 5000 ppm and is the result of the combination of a lanthanide metal halide compound with a macrocycle compound comprising at least one pyridine moiety.
本发明涉及一种鉴定物品真伪的方法,包括:将螯合化合物与物品结合,然后检测螯合化合物的存在,其中螯合化合物的存在浓度为 10 ppb 至 5000 ppm,是
镧系
金属卤化物化合物与包含至少一个
吡啶分子的大环化合物结合的结果。