Table 2.
Number of days to reach VOCM concentrations below the limit of detection (LOD) in urine stored at three temperatures collected from three volunteers in over 240 days. NA: Not applicable, since no complete loss was found at that time point. Only VOCMs that were found in urine above the LOD are included. RT= room temperature (22 °C).
| VOCM | Volunteer 1 | Volunteer 2 | Volunteer 3 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| RT | 4° C | −20° C | RT | 4° C | −20° C | RT | 4° C | −20° C | |
| CEMA | 60 | 120 | 180 | NA | NA | NA | 90 | 84 | 60 |
| SBMA | 150 | NA | NA | NA | NA | NA | 240 | NA | NA |
| AAMA | 240 | NA | NA | NA | NA | NA | NA | NA | NA |
| GAMA | NA | NA | NA | NA | NA | NA | 105 | 180 | 180 |
| CYMA | NA | NA | NA | NA | NA | NA | 180 | 180 | 180 |
| DHBMA | 210 | NA | NA | NA | NA | NA | 150 | NA | 105 |
| AMCC | 54 | NA | NA | 54 | 54 | 105 | 12 | 15 | 90 |
| BPMA | 69 | NA | NA | NA | NA | NA | NA | NA | NA |
| TTCA | 150 | NA | NA | NA | NA | NA | NA | NA | NA |
| TCVMA | 180 | NA | NA | NA | NA | NA | 105 | 210 | 105 |
| MMA | 60 | 180 | NA | NA | NA | NA | NA | NA | NA |
| HPMMA | 180 | NA | NA | NA | NA | NA | 240 | NA | 210 |
38 VOCM metabolites were analyzed. The table presents only those that were found in samples. AAMA-Sul, CMEMA, HEMA, 1,2- & 2,2-DCVMA, 2,4-, 2,5- & 3,4-DPMA, ATCA, PGA, 1,2- & 2,2-PHEMA, MA, SPMA, MU, EMA, NANPC, and IPM 1 & IPM 3 were not detected in any of the urine samples. No 100% loss of 3HPMA, 2HPMA, 2MHA, 3+4MHA, MHBMA and CMEMA was found in any of the samples and are not included on this table.
Samples stored at 4°C and −20°C endred 18 freeze-thaw cycles in 240 days.