Urine Test Strip - Detection Limit

Detection Limit

The detection limit of a test is that concentration, at which the test starts to turn from negative to positive. Although the detection limit may vary between urine samples, the detection limit is defined as that concentration of the analyte that results in a positive reaction in 90% of the examined urines.

Parameter Reference range
- more detailed
ranges in
Urinalysis article 		Practical detection limit
Specific Gravity

Reference range

Physiological range

1.016 - 1.022

1.002 - 1.035

 Range: 1.000 - 1.030
pH value

First morning urine

During the day

5 - 6

4.8 - 7.4

 Range: 5 - 9
Leukocytes

Reference range

Grey zone

< 10 Leu/µl

10 - 20 Leu/µl

10-25 Leu/µl
Nitrite - 0.05 mg/dl (11 µmol/l)
Protein

Albumin

< 2 mg/dl

6 mg/dl
Glucose

First morning urine

During the day

< 20 mg/dl

< 30 mg/dl

40 mg/dl (2.2 mmol/l)
Ketones

Acetoacetic acid

Acetone

< 5 mg/dl

-

5 mg/dl (0.5 mmol/l)

40 mg/dl (7 mmol/l)
Urobilinogen < 1 mg/dl 0.4 mg/dl (7µmol/l)
Bilirubin < 0.2 mg/dl 0.5 mg/dl (9µmol/l)
Blood

Erythrocytes

Haemoglobin

0 - 5 Ery/µl

-

5 Ery/µl

0.03 mg/dl Hb

Read more about this topic:  Urine Test Strip

Famous quotes containing the word limit: