Table 4 Mean recovery rates and coefficients of variation obtained from recovery experiments
From: Three-channel ion chromatograph for improved metabolic evaluation of urolithiasis
New ion chromatograph | Control group | Mean recovery rate | Variation coefficient (%) | |||||
|---|---|---|---|---|---|---|---|---|
Mean recovery rate (%) | Variation coefficient (%) | Mean recovery rate (%) | Variation coefficient (%) | t value | P value | t value | P value | |
Oxalate | 100.5 ± 1.04 | 2.86 ± 0.21 | 100.6 ± 1.04 | 2.84 ± 0.19 | − 1.044 | 0.299 | 0.821 | 0.414 |
Citrate | 100.4 ± 1.05 | 1.05 ± 0.11 | 100.6 ± 1.17 | 1.04 ± 0.10 | − 1.197 | 0.234 | 0.498 | 0.620 |
Calcium | 100.5 ± 1.08 | 1.31 ± 0.29 | 100.4 ± 1.01 | 1.31 ± 0.29 | 0.324 | 0.747 | 0.159 | 0.874 |
Magnesium | 100.6 ± 1.11 | 2.00 ± 0.41 | 100.5 ± 1.12 | 2.00 ± 0.41 | 0.478 | 0.634 | − 0.344 | 0.732 |
Uric acid | 100.5 ± 1.01 | 1.35 ± 0.37 | 100.5 ± 1.11 | 1.35 ± 0.38 | − 0.203 | 0.839 | − 0.366 | 0.715 |