DR/2400
Phosphorus, Acid Hydrolyzable
PhosphorusAcidHyd_TNT_Other_PHY_Eng_Ody.fm Page 1 of 6
• For more accurate results, determine a reagent blank value for each new lot of reagent. Follow the procedure using deionized
water in place of the sample. Subtract the reagent blank value from the final results or perform a reagent blank adjust. See
Section 2.6.2 Reagent Blank on page 20.
• Place a safety shield in front of the COD reactor to prevent injury if splattering occurs.
• Clean glassware with 1:1 Hydrochloric Acid Standard Solution. Rinse with deionized water. Do not use detergents that contain
phosphate to clean glassware.
• Final samples will contain molybdenum. In addition, final samples will have a pH less than 2 and are considered corrosive (D002)
by the Federal RCRA. Please see Waste Management and Safety on page 55 for more information on proper disposal of these
materials.
Phosphorus, Acid
Hydrolyzable
Method 8180
PhosVer™ 3 with Acid Hydrolysis Method
Test ‘N Tube™ Vials
(0.06 to 3.50 mg/L PO
4
3–
)
Scope and Application: For water, wastewater, and seawater
1. Turn on the COD
Reactor. Heat to 150 °C.
Place the safety shield in
front of the reactor.
2. Touch
Hach Programs.
Select program
536 P Total/AH PV TNT.
Touch
Start.
3. Use a TenSette Pipet
to add 5 mL of sample to
a Total and Acid
Hydrolyzable Test Vial.
Cap and mix.
4. Place the vial in the
COD Reactor.
Tips and Techniques
Test ‘N Tube Method 8180
Hach Programs
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