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Table 1. Precision and Spike recovery results for beta-carotene

Beta-carotene

Performance

Analytical range

10 µg/kg – 2.8 mg/kg

Limit of quantitation (LOQ)

≤ 10 µg/kg

Linearity (10 points)

0.01 – 10 mg/L: r

2

= 0.9993

Repeatability

(n = 6-fold, RSD

r

)

9.2 µg/kg (SM)

4.5 %

110 µg/kg (SM + spike)

0.9 %

520 µg/kg (IF)

4.2 %

2820 µg/kg (IF + spike)

2.9 %

Reproducibility

(n = 6 duplicates, RSD

R

)

9.2 µg/kg (SM)

110 µg/kg (SM + spike)

520 µg/kg (IF)

2820 µg/kg (IF + spike)

Recovery

(n = 6)

110 µg/kg (SM + spike)

97 %

2820 µg/kg (IF + spike)

109 %

SM = skimmed milk (liquid). IF = infant formula (powder).

Results are based on the total of

cis

and

trans

isomers.

Table 2. Precision and Spike recovery results for lutein

Lutein

Performance

Analytical range

71 µg/kg – 4.6 mg/kg

Limit of quantitation (LOQ)

≤ 71 µg/kg

Linearity (10 points)

0.02 – 3.3 mg/L: r

2

= 0.9999

Repeatability

(n = 6-fold, RSD

r

)

not detectable

(SM)

-

65 µg/kg (SM + spike)

2.4 %

1210 µg/kg (IF)

2.1 %

5020 µg/kg (IF + spike)

2.4 %

Reproducibility

(n = 6 duplicates, RSD

R

)

not detectable

(SM)

65 µg/kg (SM + spike)

1210 µg/kg (IF)

5020 µg/kg (IF + spike)

Recovery

(n = 6)

65 µg/kg (SM + spike)

98 %

5020 µg/kg (IF + spike)

101 %

SM = skimmed milk (liquid). IF = infant formula (powder).

Results are based on the total of

cis

and

trans

isomers.

Carot-01

FOR ERP USE ONLY

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