novomatics HEMOTRONIC III, Руководство по эксплуатации

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CHEMOTRONIC III
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For recalibration of the turbidity, the special polymer suspension FORMAZIN is
recommended (available from the manufacturer/supplier). FORMAZIN primary
standards are supplied in sealed dark brown 0.1 l bottles and can be used till 1
year after supply date. In order to prepare a secondary standard, one can dissolve
a small portion of the primary standard in distillated water by using standard
glassware. The following table is providing the ratios to be mixed.
Desired Standard 4000 NTU primary standard in
100 ml glass
1000 NTU 25 ml
800 NTU 20 ml
400 NTU 10 ml
200 NTU 5 ml
100 NTU 2.5 ml
Swirl the glass to mix the solution. Then pour the prepared secondary standard into
a CHEMOTRONIC test tube.
Note:
Secondary standards are stable for less than the original stock (max. storage
approx. 1 week under cool storage conditions). Therefore it is recommended to use
a secondary standard just once.
On special order, we can supply more stable premixed solutions with specific
turbidity in small quantities. The recommended value for P2 = 800 NTU in order to
guarantee full compatibility with the CHEMOTRONIC I.