Table 4. One week stability study examining the effects of different preservatives on human urine.
| Temperature: | 28°C | 4°C | -20°C | -80°C | |||
|---|---|---|---|---|---|---|---|
| Preservative: | - | 25mM EDTA | 25mM EDTA + 0.1% NaN3 | 3M GuSCN + 33% ISOH |
- | - | - |
| Average Ct (± SD) |
35.3 (±.3) |
32.8 (±.2) |
32.0 (±.1) |
30.6 (±.1) |
33.7 (±.8) |
31.7 (±.5) |
31.3 (±.3) |
All samples were extracted with the current method.
GuSCN, guanidine thiocyanate; EDTA, Ethylenediaminetetraacetic acid; NaN3, sodium azide; ISOH, isopropanol; SD, standard deviation; Ct, cycle threshold