| CFC-11 calibration standards | 1993 scale | ||||
| updated: July, 2000 | |||||
| year | prepared | assigned | residual | ||
| ppt | ppt | ppt | |||
| ALM-38408 | 1993 | 25.5 | 25.0 | -0.47 | |
| ALM-26735 | 1993 | 75.2 | 76.1 | 0.97 | |
| ALM-26738 | 1993 | 76.2 | 77.2 | 0.99 | |
| ALM-26743 | 1993 | 288.0 | 287.4 | -0.63 | |
| ALM-26737 | 1993 | 313.6 | 313.8 | 0.18 | |
| CLM-2431 | 1991 | 49.5 | 48.8 | -0.72 | |
| CLM-2482 | 1991 | 69.2 | 69.3 | 0.05 | |
| CLM-2413 | 1991 | 136.3 | 135.3 | -1.02 | |
| FF-30082 | 1988 | 189.4 | 189.2 | -0.15 | |
| std dev | 0.73 | ||||
| Note that the 1993 CFC-11 scale has
been incorrectly referred to as the 1992 scale in some documents. It is the 1993 scale. |
