C.2.6 Results

Table C.2-1. Laboratory results (DRO by AK 102)

#1 Samples #2 Samples
HWL 1-1 130 mg/kg HWL 1-2 87 mg/kg
HWL 2-1 160 mg/kg HWL 2-2 140 mg/kg
HWL 3-1 110 mg/kg HWL 3-2 110 mg/kg
Mean 133.33 mg/kg Mean 112.33 mg/kg
Standard deviation 25.17 Standard deviation 26.58

Table C.2-2. Fundamental error (based on mass analyzed by the lab)

FE = Square root of 20(d cubed) divided by m
d = particle size (0.2 cm for all samples)
m = sample mass
Sample 1-1 Sample 1-2 Sample 2-1 Sample 2-2 Sample 3-1 Sample 3-2
m = 29.98 g m = 30.04 g m = 30.05 g m = 30.01 g m= 30.03 g m = 30.02 g
FE = 0.07 FE = 0.07 FE = 0.07 FE = 0.07 FE = 0.07 FE = 0.07

Table C.2-3. Relative standard deviation

RSD = 100s divided by x
#1 Samples #2 Samples
RSD = 100(25.17) divided by 133.33 RSD = 100(26.58) divided by 112.33
RSD = 18.0% RSD=23.7%

Table C.2-4. 95% Upper confidence limit

95%UCL = x + ts divided by square root of n
#1 Samples #2 Samples
95%UCL = 133.33 + (2.92)(25.17) divided by the square root of 3 95%UCL = 112.33 + (2.92)(26.58 divided by the square root of 3)
95%UCL = 176 95%UCL = 157