Hach DR2400 - Page 670

Phosphorus, Total
© Hach Company, 2003. All rights reserved. Printed in the U.S.A. 3/04 1ed
Page 6 of 6 PhosphorusTot_TNT_Other_PAP_Eng_Ody.fm
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Orthophosphate reacts with molybdate in an acid medium to produce a mixed
phosphate/molybdate complex. Ascorbic acid then reduces the complex, giving
an intense molybdenum blue color. Test results are measured at 880 nm.
Required Reagents
Quantity Required
Description Per Test Unit Cat. No.
Total Phosphorus Test ’N Tube™ Reagent Set ............................................................... 50 tests...............27426-45
Includes:
PhosVer
™
3 Phosphate Reagent Powder Pillows..........................1 ....................... 50/pkg...............21060-46
Potassium Persulfate Powder Pillows ............................................1 ....................... 50/pkg...............20847-66
Sodium Hydroxide Solution, 1.54 N ...............................................2 mL ................ 100 mL...............27430-42
Total and Acid Hydrolyzable Test Vials .........................................1 ....................... 50/pkg
....................................*
Water, deionized ................................................................................................................. 4 liters ....................272-42
Required Apparatus
Adapter, 16-mm Cell ................................................................................1 ....................... each....................59457-00
COD Reactor, 115/230 VAC (U.S.A. and Canada)...............................1 ....................... each....................45600-00
COD Reactor, 115/230 VAC (Europe)....................................................1 ....................... each....................45600-02
Funnel, micro ............................................................................................1 ....................... each....................25843-35
Pipet, TenSette
®
, 1 to 10 mL ....................................................................1 ....................... each....................19700-10
Pipet Tips, for 19700-10 TenSette
®
Pipet ...............................................1 ....................... 1000/pkg...........21856-28
Safety Shield, laboratory bench ..............................................................1 ....................... each....................50030-00
Test Tube Rack...........................................................................................1–3 ................... each....................18641-00
Required Standards
Phosphate Standard Solution, 10-mL Voluette
®
Ampule, 50-mg/L as PO
4
3–
........... 16/pkg...................171-10
Phosphate Standard Solution, 1-mg/L as PO
4
3–
........................................................... 500 mL.................2569-49
*Not sold separately.