LaMotte LEAD IN AIR TEST KIT - Manual (Page 8)

PRO CE DURE
1.
Fill a clean impinging tube to 10 mL line with *Lead In Air
Absorbing Solution (7668). Connect impinging apparatus to intake
of air sampling pump.
NOTE:
Make sure the long tube is immersed in the absorbing
solution.
2. Adjust flowmeter to collect air sample at 1.0 Lpm for 10 minutes, or
until a measurable amount of lead is absorbed.
3. Immerse end of pH Strip (3-2957) into solution. Compare the color
of the strip to the color chart. If pH is not between 9 and 11 adjust by
adding drops of *Sodium Hydroxide, 5N (6533) to raise the pH or
drops of *Hydrochloric Acid, 1N (6130) to lower pH. Make sure the
pH is adjusted to between 9 and 11.
4. With special glass pipet (0305), squeeze rubber bulb and insert pipet
below clear preservative layer in *Lead Dithizone Reagent (4227).
Release bulb and draw green solution into pipet until solution level is
even with line. Transfer to clean test tube (0843).
CAUTION:
*Lead Dithizone Reagent contains chloroform as a
solvent — avoid spills and breathing vapor. Use with adequate
ventilation.
5. Carefully add 5 drops of *Lead Reagent #2 (7665).
CAUTION:
*Lead Reagent #2 is an alkaline solution of cyanide and
should be handled with extreme care. Do not dispose of cyanide