Ultrasensitive Detection of Pb²⁺ Based on a DNAzyme and Digital PCR

Table 1

Concentration of Pb²⁺ in environmental samples detection by the digital PCR-based detection system.

Sample	Pb^2+ spiked (nM)	Pb^2+ measured (nM)	Recovery (%)	RSD (%)
1	1	1.05	105.0	4.8
2	5	5.08	103.6	3.9
3	10	10.15	102.7	3.5
4	50	48.10	96.2	4.4