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DR/2400
Method 8007
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Scope and Application:
* Adapted from Blystone, P., Larson, P., A Rapid Method for Analysis of Phosphate Compounds, International Water Conference,
Pittsburgh, PA. (Oct 26-28, 1981)
Tips and Techniques
• Clean glassware with 1:1 Hydrochloric Acid Solution (Cat. No. 884-49), followed by a distilled water rinse. Do not clean glassware
with commercial detergent.
• Wear UV safety goggles while the UV lamp is on.
• Do not handle the UV lamp surface. Fingerprints will etch the glass. Wipe the lamp with a soft, clean tissue between samples.
• The digestion in step 7 is normally completed in less than 10 minutes. However, contaminated samples or a weak lamp can cause
incomplete phosphate conversion. Check conversion efficiency by running a longer digestion and seeing if the readings increase.
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Hach Programs
1.
Touch
.
Hach Programs
Select program
.
501 Phosphonates
Touch
.
Start
Phosphonates_PP_Other_PUV_Eng_Ody.fm
For boiler and cooling water, wastewater, and seawater
2.
Choose the
appropriate sample size
from Table 1 on page 3.
Pipet the chosen volume
into a 50-mL graduated
cylinder. If necessary,
dilute the sample to
50-mL with deionized
water and mix well.
Persulfate UV Oxidation Method*
(0.02 to 2.50 and 1.0 to 125.0 mg/L)
10 mL
3.
Fill a round sample
cell to the 10-mL mark
with diluted sample from
step 2 (this is the blank).
Phosphonates
Method 8007
4.
Fill a square sample
bottle to the 25-mL mark
with diluted sample from
step 2.
Phosphonates
Page 1 of 6
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