作者】：Fei Qu,*abQianwei Songab and Jinmao You*abc 【题名】：Rapid determination of vitamin B12 (cobalamin) based on silver nanoclusters capped by polyethyleneimine with different molecular weights and terminal groups 【期刊】：Anal. Methods, 【年、卷、期、起止页码】：2016,8, 4324-4327 【全文链接】：http://pubs.rsc.org/is/content/articlelanding/2016/ay/c6ay00088f/unauth#!divAbstract
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