* How DO the Azide modification method, for example, water-Rin
put 300 ml BOD bottle size, be careful not to have bubbles while Rin
- Fill 1 ml aqueous solution and manganese sulfate by alkali pattern-I-o-8 side 1 ml (further below the surface)
. -Close the CAP Don't make bubbles. Upside down bottle up and down several times. Keep the area, settling finally in clear water quantity exceeds half of the bottle
. -Fill a Fukuoka Sullivan acid 1 ml concentrated well to the acid flowing gently aside bottlenecks. Close the CAP Mix solution together with upside down up and down until they all dissolve sludge
- Both examples come 201 ml (or decant sample from 99 ml BOD bottles)
. -To prepare a standard solution with great kidney sodium sulfate 0.0125 MOL/litre o tie until the solution has a light yellow
- Water dough 2-3 drops of dark blue will be the next great Te Tai with a standard solution of sodium sulfate-0 tie.125 MOL/litre until the blue color disappears (colorless)
- Read the volume of the standard solution of sodium sulfate-Tai Chi that is equal to the value DO
.
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