TABLE 4.
Recoveries obtained from the QC samples with one of three concentrationsa
| Concn (mg/liter) | n | Mean recovery ± SD (%) |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| AMX | PIP | OXA | CLX | FEP | CAZ | CTX | CFZ | IS | ||
| 6 | 6 | 74.8 ± 3.1 | 98.5 ± 2.6 | 90.2 ± 2.3 | 93.6 ± 2.1 | 91.9 ± 2.8 | 74.5 ± 2.8 | 92.8 ± 3.0 | 93.9 ± 2.5 | 88.3 ± 5.5 |
| 30 | 6 | 73.9 ± 3.5 | 92.4 ± 3.4 | 92.5 ± 2.5 | 98.7 ± 2.7 | 87.2 ± 3.0 | 79.4 ± 3.8 | 87.0 ± 3.1 | 87.4 ± 2.9 | 86.1 ± 3.3 |
| 70 | 6 | 80.8 ± 1.3 | 99.5 ± 1.4 | 84.5 ± 1.2 | 91.6 ± 1.4 | 93.4 ± 1.3 | 76.0 ± 1.7 | 93.0 ± 1.5 | 93.5 ± 1.6 | 83.8 ± 7.4 |
| Total | 18 | 76.5 ± 4.9 | 96.8 ± 4.1 | 89.0 ± 4.5 | 94.7 ± 3.9 | 90.8 ± 3.8 | 76.7 ± 3.9 | 90.9 ± 4.0 | 91.6 ± 4.0 | 86.1 ± 5.7 |
a
n, number of replicates; AMX, amoxicillin; PIP, piperacillin; OXA, oxacillin; CLX, cloxacillin; FEP, cefepime; CAZ, ceftazidime; CTX, cefotaxime; CFZ, cefazolin; IS, internal standard.