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Description
| MIXTURE SPECIFICATIONS | |||
| PRIMARY STANDARDS | |||
| Mixture Range | 50ppm to 4,999ppm | 0.5% to 50% | |
| Preparation Tolerance | +/- 5% of component | +/- 2% of component | |
| Certification Tolerance | +/- 2% of component | +/- 2% of component | |
| or +/- 2% of absolute, | |||
| whichever is smaller | |||
| Tolerances may vary for low molecular weight components depending upon the concentration level requested | |||
| CERTIFIED STANDARDS | |||
| Mixture | 5ppm to 99ppm | 100ppm to 0.99% | 1% to 50% |
| Preparation Tolerance | +/- 20% of component | +/- 10% of component | +/- 5% of component |
| Certification Tolerance | +/- 5% of component | +/- 2% of component | +/- 2% of component |
| Tolerances may vary for components which present absorption, stability, or physical blending problems | |||
| UNANALYZED MIXTURES | |||
| Mixture Range | 0.1% to 0.99% | 1% to 50% | |
| Preparation Tolerance | +/- 15% of component | +/- 10% of component | |
| * Nominal accuracies | |||