Summary of Changes to the USP Chapter 41
Chapter 41 | Old | New |
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Area of application |
|
|
Repeatability | Old | New |
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Repeatability tolerance | 0.1 (49)% | 0.10% |
Expansion factor K | 3 | 2 |
Number of weighing values for the repeatability test | 10 | 10 |
Acceptance criterion | 3 x std. dev. / m ≤ 0.1% | 2 x std. dev. / m ≤ 0.10% |
Smallest possible sample weight | Lowest starting point | 1,000 d | 820 d |
Accuracy | Old | New |
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Tolerance | NA | ≤ 0.10% |
Reference weight | NA | Between 5% and 100 % of the balance’s operating range |