LC/UV GC/FID INTRA-DAY PRECISION RR mean 12.481 – 12.783 0.046 – 0.047 CV% 1.9 – 2.6 4.1 – 8.2 INTER-DAY PRECISION RR mean 12.590 0.031 CV% 2.4 6.6 SD 0.296 0.002 ACCURACY  % Recovery 99.7-100.5 94.4-105.5 LOQ (ppm) 25 17 LOD (ppm) 12.5 7

Table 4: Statistical parameters of precision, accuracy, LOQ and LOD.