Calculation of ISR deviation [Bioanalytics]
Dear all,
stupid question. Sometimes I feel I’m lacking the most basic skills. EMA’s GL states:
Have we been too stringent? Does EMA expect instead:
Confusing.
stupid question. Sometimes I feel I’m lacking the most basic skills. EMA’s GL states:
The concentration obtained for the initial analysis and the concentration obtained by reanalysis should be within 20% of their mean for at least 67% of the repeats.
In the past we have calculated the percent deviation of the difference between measurements from their mean. Example: 1st 2nd x ∆2-1 |∆ (% x)|
40.303 42.333 41.318 +2.030 4.91
Have we been too stringent? Does EMA expect instead:
1st 2nd x ∆1-x ∆2-x ∆1 (% x) ∆2 (% x) |∆1,2 (% x)|
40.303 42.333 41.318 -1.015 +1.015 -2.46 +2.46 2.46
Confusing.
—
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Helmut Schütz
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Dif-tor heh smusma 🖖🏼 Довге життя Україна!
![[image]](https://static.bebac.at/pics/Blue_and_yellow_ribbon_UA.png)
Helmut Schütz
![[image]](https://static.bebac.at/img/CC by.png)
The quality of responses received is directly proportional to the quality of the question asked. 🚮
Science Quotes
Complete thread:
- Calculation of ISR deviationHelmut 2013-04-23 19:30
- Calculation of ISR deviation ElMaestro 2013-04-23 20:30
- I see… Helmut 2013-04-23 22:08
- Calculation of ISR deviation Roberto 2013-12-09 12:52
- Calculation of ISR deviation Ohlbe 2013-04-24 09:40
- Calculation of ISR deviation Helmut 2013-04-24 14:07
- Calculation of ISR deviation Ohlbe 2013-04-24 22:37
- Calculation of ISR deviation Helmut 2013-04-25 02:00
- Calculation of ISR deviation Ohlbe 2013-04-24 22:37
- Calculation of ISR deviation Helmut 2013-04-24 14:07
- Calculation of ISR deviation ElMaestro 2013-04-23 20:30