Research Article
[Retracted] Differential Scanning Calorimetry Material Studies: Benzil Melting Point Method for Eliminating the Thermal History of DSC
Table 2
Evaluation results of the uncertainty of DSC method.
| | Category | Parameter | Meaning | Evaluation method | Standard uncertainty/u (°C) | Relative standard uncertainty/urel |
| | Uncertainty introduced by the calibration process. | u1 | Uncertainty introduced by indium itself. | u1 = U/k | 0.13 | 8.30 × 10−4 | | u2 | Uncertainty introduced by repeated measurements of indium. | u2 = In RSD | 0.0011 | 6.64 × 10−6 | | u3 | Uncertainty component introduced by instrument temperature error. | u3 = △Tmax/k | 0.0016 | 9.90 × 10−6 |
| | Uncertainty introduced by the sample itself. | u4 | Uncertainty introduced by repeated measurements of samples. | u4 = Benzil’s RSD | 0.0027 | 4.45 × 10−5 | | u5 | Uncertainty component introduced by sample uniformity. | | 0.045 | 2.47 × 10−4 | | u6 | Uncertainty component introduced by short-term stability. | u6 = s (β1)·t | 0.0028 | 2.53 × 10−5 | | u7 | Uncertainty component introduced by sample mass. | u7 = △Tmax/k | 0.029 | 3.05 × 10−4 |
| | Uncertainty introduced by experimental conditions. | u8 | Uncertainty component introduced by heating rate. | u8 = △Tmax/k | 0.029 | 3.05 × 10−4 | | u9 | Uncertainty component introduced by airflow rate. | u9 = △Tmax/k | 0.0016 | 1.21 × 10−4 | | u10 | Uncertainty component introduced by a thermal lag coefficient. | u10 = τ0’s RSDdT/dt | 0.0027 | 1.21 × 10−4 |
| | Combination of uncertainties | uDSC,rel | Relative standard uncertainty of DSC. | | | 9.84 × 10−4 | | uDSC | Combined standard uncertainty of DSC. | | | 0.0932 | | U(k = 2) | Expanded uncertainty. | | | 0.19 |
|
|
