TABLE 1.—Summary of analytical conditions 
Instrument conditions 
Element Instrument 
(NlSsSaSS5 ICP (argon) 
Ge ee ICP (argon) 
(Qale==sse5 Graphite 
furnace AA. 
(GeeESSSSSS Graphite 
furnace AA. 
Qwes==S=> Graphite 
furnace AA. 
Fe---—-—— ICP (argon) 
big@=S=SSS Induction 
furnace AA. 
iiss SS ICP (argon) 
NS Graphite 
furnace AA. 
[=e Graphite 
furnace AA. 
Vaasa Graphite 
furnace AA. 
308.2 nm 
FP (Forward power)=1.1 kw 
Fixed cross flow nebulizer 
Spectral band width 0.036 nm 
Observation height 16 mm. 
455.4 nm 
FP=1.1 kw 
Fixed cross flow nebulizer 
Spectral band width 0.036 nm 
Observation height 16 mm. 
110°C dry temperature 
250°C char temperature 
2100°C atom temperature 
Regular graphite tube 
Interrupt gas flow 
W.1.=228.8 nm 
$lit=0.7 nm. 
110°C dry temperature 
900°C char temperature 
2700°C atom temperature 
Regular graphite tube 
Normal gas flow (low) 
W.1.=357.9 nm 
$lit=0.7 nm. 
110°C dry temperature 
850°C char temperature 
2700°C atom temperature 
Regular graphite tube 
Interrupt gas flow 
W.1.=324.7 nm 
S$lit=0.7 nm. 
259.9 nm 
FP=1.1 kw 
Fixed cross flow nebulizer 
Spectral band width 0.036 nm 
Observation height 16 nm. 
Wavelength=254 nm 
Cold vapor AA. 
257.6 nm 
FP=1.1 kw 
Fixed cross flow nebulizer 
Spectre’ band width 0.036 nm 
Observacion height 16 nm. 
110°C dry temperature 
900°C char temperature 
2700°C atom temperature 
Pyrolytic tube 
Normal gas flow (low) 
W.1.=232.0 nm 
Slit=0.2 nm. 
110°C dry temperature 
500°C char temperature 
2700°C atom temperature 
Regular graphite tube 
Interrupt gas flow 
W.1.=283.3 
Slit=0.7 nm. 
110°C dry temperature 
1000°C char temperature 
2800°C atom temperature 
Procedure 
determination Average blanks, 
Extraction limit in sample, as measured in 
procedure _ ug/g ug/g in solution 
ONO aaa 50 0.02 
INO 20 -O1 
Butyl acetate 0.02 -0002 
and DDTC. 
NO 2 -003 
Butyl acetate 1 005 
and DDTC. 
IN a 50 -02 
INO 0.005 0.005 
Butyl acetate 10 -006 
(removal of iron). 
INO 2 -02 
Butyl acetate 1 202 
and DDTC. 
None-~—~--~—-~~~-~~~~~-~__ 3 -002 
