Preparation of Nanosilver and Nanogold Based on Dog Rose Aqueous Extract

Table 7

Specification of Au (III) complexes formed after the addition of NaOH to a solution of chloroauric acid.

pH ranges	Complex
0.0–3.0	AuCl4^−·HCl
3.1–7.0	AuCl4^−
7.1–9.0	AuCl3OH^−
9.1–10.0	AuCl2(OH)2^−
10.1–11.0	AuCl(OH)3^−
11.1–13.5	Au(OH)4^−