Hanna-instruments HI 904 Bedienungsanleitung PDF herunterladen (Seite 81)

5-23

METHODS

5.7 Bromine Index

The HI 904 is capable of performing Bromine Index/Bromine Number determinations. Bro-

mine Index/Number is a measure of the unsaturation of hydrocarbons, expressed as the

amount of bromine required to react with 100 g of sample. Bromine Index is expressed as

mg Br/100g; Bromine Number is expressed as g Br/100g. The HI 904 can be set up to

perform Bromine Index determinations by following the steps:

(1)Prepare the titrator according to Section 2 of the manual, except remove all desiccant

from the desiccant cartridges. Bromine Index reagents contains water and will rapidly

saturate desiccant.

(2)Fill a GL45 bottle with Bromine Index reagent. Consult a standard method for preparation

instructions.

(3)Connect the Bromine Index reagent bottle to the titrator and fill the vessel according

to Section 2 of the manual.

(4)Set a method to “Bromine Index” mode by either selecting a bromine index standard

method (e.g.: HI 9901EN), or by creating a custom method:

• Go to the

Select Method

screen. Create a new user method for Bromine Index

determinations. Select this new method.

• Go to

Method Options

section, then

Type:

• Select

Bromine Index

• Exit

Method Options

. Remember to save the changes to the method.

(5)Press .

There are several changes to the user interface while running a Bromine Index method:

• “Drift Analysis” mode has been removed.

• “Relative Drift” and “Absolute Drift” termination criteria have been removed.

• All calculations are as µg (or mg) Bromine.

• Result units have been changed to appropriate Bromine Index units.

1 2 ... 76 77 78 79 80 81 82 83 84 85 86 ... 179 180

Keine Kommentare

Hanna-instruments HI 904 Bedienungsanleitung Seite 81