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Table 4 Interference of haemoglobin, intralipid and bilirubin was tested by adding these substances to patient samples

From: A new turbidimetric immunoassay for serum calprotectin for fully automatized clinical analysers

Substance

Amount of substance

Control - mg/L

Test - mg/L

Observed difference - mg/L

Max allowed difference - mg/L

Within acceptance (yes/no)

Hemoglobin - low

5 g/L

1,54

1,46

0,08

0,15

yes

Hemoglobin - high

5 g/L

10,06

9,92

−0,14

0,99

yes

Intralipid - low

10 g/L

1,48

1,37

−0,11

0,15

yes

Intralipid - high

10 g/L

9,71

9,7

−0,01

0,97

yes

Bilirubin - low

400 mg/L

1,52

1,5

−0,02

0,15

yes

Bilirubin - high

400 mg/L

10,02

10,01

−0,01

1,00

yes

  1. The calprotectin values before and after addition was compared. A difference of ≤10 % was the criteria for acceptance. None of the substances had significant interference at tested levels