Hanna Instruments HI 902 Color, Быстрый старт

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Method ID: HI1007EN
Chloride in Water
0.00-150.00 mg/L
Titrator Application Methods: General Methods - r. 2.3
Description:
Method for the determination of chloride in water.
The results are expressed in
mg/L (ppm) as
Chloride .
Reference:
Standard Methods for the Examination of Water and
Wastewater 21
st
edition, Method 4500-Cl
-
.
Electrode :

HI 4015 Silver Sulfide Half-cell ISE

HI 5315 ISE Reference Electrode

HI 7662-T Temperature Probe
- or -

HI 4115 Silver Sulfide Combination ISE

HI 7662-T Temperature Probe
Reagents :

HI 70448 0.02N Silver Nitrate solution (1 L)

HI 70427 1.5M Nitric Acid Solution (500 mL)

HI 70436 Distilled Water (1 gal)
Accessories :

HI 7072 Electrode Fill Solution (4*30 mL)

150-mL Glass Beakers

100-mL Class-A Volumetric Pipette

10-mL Class-A Volumetric Pipette
Procedure :

Connect the silver sulfide ISE, reference electrode
and temperature probe to the titrator.

Press “
Select Method
” from the main screen. Use
the arrow keys to highlight „HI1007EN Chloride in
Water‟ and press “
Select
”.

Install a 25-mL burette with 0.02M silver nitrate
solution (HI 70448) on pump-one and verify that
no air bubbles are present in the burette or tubing.
If necessary prime until all air has been removed
completely.
For the determination of the exact concentration of
silver nitrate, follow
HI0200EN 0.02M Silver
Nitrate Titrant Determination .

Use a class-A glass pipette to transfer exactly
100.00 mL of sample to a clean 150-mL glass
beaker.

Add 10 mL of 1.5 M nitric acid solution (HI 70427)
to the beaker.

Place the beaker under the stirrer assembly and
immerse the silver sulfide ISE, reference
electrode, temperature probe and stirrer. Ensure
the electrodes are 5-6 mm below the surface.

Press “
Start
”. The titrator will begin the analysis.

At the end of the titration, after detection of the
equivalence point, „titration completed‟ will appear
with the chloride concentration. The result is
expressed in
mg/L as chloride .

Remove the electrodes and stirrer from the
sample and rinse thoroughly with distilled water.
Method Parameters :
Name: Chloride in Water
Method Revision: 2.3
Titration Type: Standard Titration
Analog Board: Analog 1
Stirrer Configuration: Stirrer 1
Pump Configuration:
Titrant Pump: Pump 1
Dosing Type: Dynamic
min Vol: 0.030 mL
max Vol: 0.500 mL
delta E: 5.000 mV
End Point Mode: mV 1EQ point, 1st Der.
Recognition Options:
Threshold: 100 mV/mL
Range: No
Filtered Derivatives: No
Pre-Titration Volume: 0.000 mL
Pre-Titration Stir Time: 0 sec
Measurement Mode: Signal Stability
delta E: 1.0 mV
delta t: 1.5 sec
t-min wait: 2 sec
t-max wait: 20 sec
Electrode Type: Silver Sulfide ISE
Blank Option: No Blank
Calculations: Sample Calc. by Volume
Dilution Option: Disabled
Titrant Name: 0.02M AgNO3
Titrant Conc.: 2.0000E-2 M (mol/L)
Analyte Size: 100.00 mL
Analyte Entry: Manual
Maximum Titrant Volume: 25.000 mL
Stirring Speed: 1400 rpm
Potential Range: -2000.0 to 2000.0 mV
Volume/Flow Rate: 25 mL/50 mL/min
Signal Averaging: 1 Reading
Significant Figures: XXXXX
Calculations :
Calculations: Sample Calc. by Volume
Titrant units: M (mol/L)
Titrant volume dosed: V (L)
Final result units: ppm (mg/L)
Titrant conc.: 0.02000 mol/L
(sample/titrant): 1.000 mol/mol
MW of sample: 35.453 g/mol
Sample volume: 100.00 mL
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