OMB Meeting Book - Jan. 11, 2018

Table 5: Repeated measurements of a beverage sample spiked with 50 mg/kg gluten

Spike level [mg/kg]

OD [450 nm]

Gluten conc. [mg/kg]

Recovery, %=observed/nominal x 100

Replicate

1 2 3 4 5 6 7 8 9

1,040 1,030 1,018 0,999 1,018 1,001 1,027 1,010 1,048

50,2 49,3 48,2 46,4 48,2 46,6 49,0 47,4 51,0 48,5 1,57

100

99 96 93 96 93 98 95

50

102

Overall mean

97

Repeatability SD

Repeatability RSD, %

3

Table 6: Repeated measurements of a beverage sample spiked with 4 mg/kg gluten

Spike level [mg/kg]

OD [450 nm]

Gluten conc. [mg/kg]

Recovery, %=observed/nominal x 100

Replicate

1 2 3 4 5 6 7 8 9

0,250 0,259 0,244 0,259 0,266 0,265 0,266 0,262 0,258 0,256 0,268 0,269 0,300 0,269 0,260 0,262 0,259 0,323 0,268 0,273

3,91 4,15 3,80 4,15 4,40 4,36 4,40 4,26 4,12 4,05 4,46 4,50 5,57 4,50 4,19 4,26 4,15 6,36 4,46 4,64 4,43 0,58

98

104

95

104 110 109 110 107 103 101 112 113 139 113 105 107 104 159 112 116 111

10 11 12 13 14 15 16 17 18 19 20

4

Overall mean

Repeatability SD

Repeatability RSD, %

13

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