Brandtech-scientific EASYCAL 4.0 Manuel d'utilisateur télécharger pdf (Page 31)

EASYCAL

™

User Guide Version 4.0 · Status: June 2008 31

EASYCAL

™

User Guide

7.4 Calculations for Liquid Handling

Excerpt from ISO 8655/3, Table refers to 1013 hPa

Temperature Factor Z

°C ml/g

15 1.0020

15.5 1.0020

16 1.0021

16.5 1.0022

17 1.0023

17.5 1.0024

18 1.0025

18.5 1.0026

19 1.0027

19.5 1.0028

20 1.0029

Temperature Factor Z

°C ml/g

20.5 1.0030

21 1.0031

21.5 1.0032

22 1.0033

22.5 1.0034

23 1.0035

23.5 1.0036

24 1.0038

24.5 1.0039

25 1.0040

25.5 1.0041

Temperature Factor Z

°C ml/g

26 1.0043

26.5 1.0044

27 1.0045

27.5 1.0047

28 1.0048

28.5 1.0050

29 1.0051

29.5 1.0052

30 1.0054

Table for Liquid Handling instruments

Factor “Z” [ml/g]

The following calculations must be carried out:

1. Mean weight:

x

_

=

x

1

+ x

2

+ x

3

+ x

4

+ x

5

+ x

6

+ x

7

+ x

8

+ x

9

+ x

10

10

2. Mean volume:

VV

_

= x

_

·Z ⇒ For factor Z, see Table

3. Standard deviation:

s = Z ·

(x

1

- x

_

)

2

+ (x

2

- x

_

)

2

+ (x

3

- x

_

)

2

+ (x

4

- x

_

)

2

+ ...(x

10

- x

_

)

2

⇒ For factor Z, see Table

9

4. Accuracy:

A [%] =

V

_

- V

nominal value

· 100

V

nominal value

5. Coefficient of variation:

CV [%] =

s · 100

V

_

1 2 ... 26 27 28 29 30 31 32 33 34 35 36

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