AOAC 2018 Methods

Table 2018.03I : Performance characteristics for 2-MCPD esters, 3-MCPD esters and glycidyl esters.

Recovery (%)

RSD r (%)

RSD iR (%)

Median (µg/kg)

25 µg/kg (p) 3 µg/kg (l)

1800 µg/kg (p) 300 µg/kg (l)

1800 µg/kg (p) 300 µg/kg (l)

1800 µg/kg (p) 300 µg/kg (l)

Analyte

Sample

Unspiked

Unspiked

IF powder 1 IF powder 2 Adult Nut 3 liquid Adult Nut 4 liquid IF powder 1 IF powder 2 Adult Nut 3 liquid Adult Nut 4 liquid IF powder 1 IF powder 2 Adult Nut 3 liquid Adult Nut 4 liquid

32

100 102 101

-

3.2 4.0

-

4.4 6.2

-

19.7

98

2.9

2.8

2- MCPD ester

-

-

1.2

-

19.3

23.5

2.3

5.6

2.5

-

94

9.2 5.4 5.9 9.3 2.5 4.9 3.4 8.9

9.6 7.0 5.4

97.4 62.8

98

-

-

-

124 106

104

2.7

5.9

3- MCPD ester

-

-

-

4.2

21.4

-

94

1.8

3.8

11.4

3.6 9.9 6.0

16

95 96

-

-

-

26.4

107

4.6

6.9

3.9

102

-

-

11.1

-

GE

32.5

-

99

3.7

2.1

5.5

5

Table 2018.03J : Performance characteristics for free 2-MCPD and 3-MCPD. Median values in bracket are below LOQ (2.5 µg/kg).

Recovery (%)

RSD r (%)

RSD iR (%)

Median (µg/kg)

Analyte

Sample

5 µg/kg

700 µg/kg

5 µg/kg

700 µg/kg

5 µg/kg

700 µg/kg

IF powder 2 Adult Nut 4 liquid IF powder 2 Adult Nut 4 liquid

(0.9) (0.4)

101 101

102

4.7 3.2 3.9 7.2

1.8 1.2 1.5 1.7

5.8 6.4 5.8 6.5

1.8 3.4 1.3 2.5

2- MCPD 3- MCPD

91

3.5

97

102

102

97

(2.1)