LaMotte FI-DB User Manual
PHOSPHONATE TEST KIT
MODEL AB-OP · CODE 7635-01
QUANTITY CONTENTS CODE
2 x 230 mL Thorium Nitrate Solution 6158-K
30 mL *Hydrochloric Acid, 1.0N *6130-G
30 mL *Fluoride Inhibitor *3929-G
30 g *Xylenol Orange Reagent Powder *6165-G
15 mL Sodium Thiosulfate, 0.1N 6155-E
1 Pipet, 1.0 mL, plastic 0354
1 pH Test Paper 2958
1 Spoon, 0.5 g, plastic 0698
1 Erlenmeyer Flask, 125 mL, glass 0431
1 Graduated Cylinder, 50 mL, glass 0418
1 Automatic Buret Assembly 0427
*WARNING: Reagents marked with a * are considered to be potential
health hazards. To view or print a Material Safety Data Sheet (MSDS) for
these reagents see MSDS CD or www.lamotte.com. To obtain a printed copy,
contact LaMotte by email, phone or fax.
To order individual reagents or test kit components, use the specified code
number.
Read the LaMotte Automatic Buret Instruction Manual before
proceeding.
PRO CE DURE
1. Fill graduated cylinder (0418) to 50 mL line with sample water.
Transfer to 125 mL Erlenmeyer flask.
2. Add 3 drops of Sodium Thiosulfate, 0.1N (6155). Swirl to mix.
3. Use 1.0 mL pipet (0354) to add 1 mL of *Fluoride Inhibitor
(3929). Swirl to mix.
4. Use the 0.5g spoon (0698) to add one measure of *Xylenol Orange
Reagent Powder. Swirl until powder is dissolved.
5. Adjust pH to between 2.5 and 3.0. Dip one strip of pH paper
(2958) into sample. Match color to a color standard on the side of
the roll. Add *Hydrochloric Acid, 1.0N (6130) drop by drop,
checking pH after each drop until color matches 2.8 standard.
Solution will be yellow.
6. Fill buret (0427) with Thorium Nitrate Solution (6158). While
swirling flask, slowly add Thorium Nitrate Solution until yellow
color just turns pink. Record buret reading as Value A.
7. Repeat Steps 1 - 6 on phosphonate-free water. Record buret reading
as Value B.
8. Subtract Value B from Value A. Multiply by 4. Record as ppm
Phosphonate.
(Value A - Value B) x 4 = ppm Phosphonate
NOTE: This test is calibrated for Dequest 2006 (NaAMP). Other
phosphonate compounds may require a different multiplication
factor. For best results the Thorium Nitrate Solution must be
calibrated against accurately prepared solutions of the compound
being used.
LaMOTTE COM PANY
Helping Peo ple Solve An a lyt i cal Challenges
PO Box 329 • Chestertown • Mary land • 21620 • USA
800-344-3100 • 410-778-3100 (Out side U.S.A.) • Fax 410-778-6394
Visit us on the web at www.lamotte.com
®
2/07
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