| r | correlation coefficient |
| LOD | limit of detection determined by the ISO method |
| LOQ | limit of detection determined by the second ISO method |
| RSD | relative standard deviation calculated from the individual measurements and fit into the straight line equation and compared to the input value |
| SOX | sarcosine oxidase (EC 1.5.3.1) |
| SPION | superparamagnetic iron oxide nanoparticles |
| TPP | sodium tripolyphosphate |
| TMB | 3,3′,5,5′-tetramethylbenzidine |
| CS | chitosan |
| 4-AAP | 4-aminoantipyrine |
| IC50 | the half maximal inhibitory concentration |
| RBC | red blood cell |
| AuNPs | gold nanoparticles |
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