Hach BODTrak II, Руководство пользователя

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4. Add the contents
of 1 nutrient buffer
pillow to the
graduated cylinder.
5. Move the
contents of the
graduated cylinder to
a BODTrak II bottle.
Continue to
Completion steps for
all procedures
on page 12. Repeat
steps 1 to 5 for
additional samples.
7.3 Hach Standard Method procedure
Items to collect:
• Thermometer
• BODTrak II bottle
• Blender (optional)
• Graduated cylinder
• Tensette pipet and pipet tips
• Wash water bottle
• Ampule breaker (for GGA)
Required reagents:
• 1 nutrient buffer pillow
• Additional nutrient or buffer (optional)
• Deionized water
• Hach GGA Solution (optional)
Before starting the test:
Use the sample volume table to select the correct sample size.
If samples are seeded, prepare a seed blank before a sample is
prepared. Treat the seed blank the same as any other sample and
omit step 5.
Use Hach BOD Standard Solution Ampules for Manometric Method
(3000 mg/L Glucose, 3000 mg/L Glutamic Acid) for GGA.
Refer to Special considerations on page 15 for special
considerations.
Use the correct volumes and dilution factor for the BOD range as shown
in
Table 5 .
Table 5 Hach Standard Method sample volumes
BOD range
(mg/L) Sample
volume
(mL) Seed
volume (mL) Final
volume
(mL) Dilution
factor
0 to 35 370 10 to 35 420 1.14
0 to 70 305 10 to 35 355 1.16
0 to 350 110 10 to 35 160 1.45
0 to 700 45 10 to 35 95 2.11
GGA
(0 to 350) 8 10 to 35 160 —
3
3
The GGA result calculation does not include a dilution factor. Refer to Hach Standard Method results on page 14, step 5 to calculate the GGA
result.
English 11