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10:1 Contamina(on from the Analyst and Apparatus

Contamina(on from the analyst:

Fig 10.1 Entering The Clean Room

The area pictured in figure 10.1 is the buffer zone between the outside air and the main clean room. Air entering with the analyst is filtered (at the rate of 1.5 @mes per minute) before the analyst enters the main clean area. A cart contains a HEPA vacuum used for cleaning objects to be taken into the main clean room. A ‘s@cky mat' on the floor just inside the room will remove shoe dust and other contaminants. Another s@cky mat (not pictured) is placed just before the entry way to the buffer zone. The analyst pictured here is wearing disposable "clean room" clothing. There are three separate pieces (head covering, foot covering, and main coverall). The clothing is worn over normal street clothes and should never leave the clean room area.

10:2 Contamination from the Analyst and Apparatus

Contamina(on from the analyst: Common Contaminants

• Sweat contains Ca, Mg, Pb, K, NH4+ , SO4-2, PO4-3, and Cd (for those who smoke). • CosmeDcs can contain high concentraDons of Al, Be, Ca, Cu, Cr, K, Fe, Mn, Ti, and Zn. • Some hair dyes contain Pb(OAC)2. • Dandruff shampoo can contain significant levels of Se. • Eye make-up may contain Hg as a preservaDve. • Calamine loDon is almost pure ZnO. • Watches and jewelry contain an assortment of elements and should not be worn in the laboratory.