Metal

Regression equation

(y = mx + b)

R²

Wavelength (nm)

LOD (μg/g )

LOQ (μg/g )

Mg

y = 0.53224x + 0.0107

0.9966

285

0.0169

0.0564

Zn

Y = 0.07834x + 0.1288

0.9340

214

0.1914

0.6382

Fe

y = 0.02921x + 0.0048

0.9936

248

0.0308

1.027

Cu

y = 0.04612x + 0.0022

0.9991

325

0.0650

0.2168

Ca

y = 0.02088x + 0.0202

0.9718

423

0.5747

1.916

Pb

y = 0.02371x − 0.0071

0.9858

217

0.0127

0.0422

Cr

y = 0.02525x + 0.0189

0.9864

358

0.1188

0.3960

Cd

y = 0.07021x + 0.0859

0.9638

229

0.1282

0.4273

Ni

y = 0.03193x + 0.0102

0.9970

232

0.0376

0.1253