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. 2017 Dec 15;5(4):70. doi: 10.3390/biomedicines5040070

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© 2017 by the author.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Mass spectral identification of surface ligands. (A) _LMALDI that detects Au ions; (B) typical LDI (matric free) analysis of AuNP_KG-50 synthesized by a mixture of kudzu root and gum; (C) typical LDI analysis of a mixture of kudzu and gum solutions; (D) typical LDI (matrix free) analysis of AuNP_G-50 synthesized by a gum solution alone; (E) typical LDI (matrix free) analysis of AuNP_K-50 synthesized by a kudzu extract alone; and (F) analysis of a blank solution. Peak identification 1: 73 m/z arabinose, galactose, fructose; 2: 147 m/z galactose; 3: 217 arabinose; 4: 225 m/z daidzein; 5: 229 m/z d4-daidzein; 6: 370 m/z not identified; 7: 417 m/z puerarin, 8: 429 not identified; 9: 894 kakkasaponin; Au⁺ 193 m/z; Au₃⁺ 396 m/z.