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Table T7. Analytical conditions for ICP-AES analyses.

Element Wavelength
(nm)		 Integration
time per
calculation
point
(s)		 Photomultiplier
voltage
(V)		 Photomultiplier
gain		 Increment
between
points
(nm)		 Number of
calculation
points		 Limit of
detection
(ppm)
Al† 396.152 0.5 720 1 0.002 7 0.109
Ba 455.403 0.5 730 10 0.002 7 10
Ca† 393.366 0.5 350 1 0.002 7 0.084
Co 228.616 0.5 990 100 0.002 7 39
Cr 267.716 0.5 860 100 0.002 7 22
Cu 324.754 0.5 690 10 0.002 7 112
Fe† 259.940 0.5 560 10 0.002 7 0.328
K† 766.490 0.5 990 100 0.002 7 0.014
Mg† 285.213 0.5 600 10 0.002 7 0.220
Mn† 257.610 0.5 580 100 0.002 7 0.016
Na† 589.592 0.5 610 10 0.002 7 0.086
Ni 231.604 0.5 990 100 0.002 7 55
P† 178.229 0.5 990 100 0.002 7 0.143
Si† 251.611 0.5 570 10 0.002 7 0.522
Sr 407.771 0.5 560 10 0.002 7 2
V 292.402 0.5 960 100 0.002 7 3
Y 371.029 0.5 620 100 0.002 7 2
Zr 343.823 0.5 640 100 0.002 7 6
Ti† 334.941 0.5 570 10 0.002 7 0.021
Sc 361.384 0.5 660 100 0.002 7 1

Notes: ICP-AES = inductively coupled plasma–atomic emission spectrometry. † = Limit of detection reported as oxide weight percent. Detection limits of the instrument represent three times the instrumental blank (See “Analysis” in “ICP-AES analyses of major and trace elements”).

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