Table 2.

The LODs of Cd element obtained by different methods.

LODs	Matrix	Method	References
7.1 mg/L	water	Direct detection	22
1.4 mg/L	ice	Liquid-solid transformation	22
0.21 µg/mL	ion exchange membranes	Filtering and Enrichment	38
29 µg/L	graphite groove	Heating and Enrichment	36