Table 2: Effect of type and concentration of eluting agent on recovery of analytes ( 𝑁 = 3 ).

Eluent conditionsRecovery (%)
CdCoFeNiZn

H2SO457.3100.063.151.744.1
HNO312.258.263.149.661.8
HCl67.288.073.680.269.8
HClO458.370.5100.342.425.6
HCl 3 M71.285.675.196.463.1
HCl 4 M82.588.679.188.670.6
HCl 5 M94.599.5102.394.595.6
HCl 7 M81.383.189.682.466.4
HCl 8 M80.472.587.470.559.1
5 mL HCl 5 M19.840.452.657.856.4
7 mL HCl 5 M54.059.864.370.578.1
8 mL HCl 5 M97.8102.097.6103.298.6
9 mL HCL 5 M37.169.675.657.887.5
12 mL HCl 5 M22.979.789.568.486.6