Table 1 The precision at LOD and LOQ concentrations of SHH and MAP PGIs

1

2,196

6,280

2,496

7,109

2

2,094

6,300

2,344

7,350

3

2,173

6,351

2,342

6,973

4

2,085

6,240

2,349

7,300

5

2,210

6,190

2,488

7,246

6

2,090

6,250

2,371

6,920

Mean

2,141.33

6,268.50

2,398.66

7,149.66

Standard deviation

57.88

55.22

73.58

177.52

%RSD

2.70

0.88

2.94

2.48

Concentration

0.02 ppm

0.06 ppm

0.02 ppm

0.06 ppm