Green Synthesis of Fluorescent Ag Nanoclusters for Detecting Cu²⁺ Ions and Its “Switch-On” Sensing Application for GSH

Table 1

Application of the probe for Cu²⁺ in real samples (data are average of three replicate measurements).

Sample	Cu^2+ (pM)		Recovery (%)
	Added	Found
Mineral water	1	1.07 (±0.1)	107
	100	103 (±11)	103
	10000	10073 (±110)	101