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
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