Page:NIOSH Manual of Analytical Methods - 7504.pdf/7

 VANADIUM OXIDES: METHOD 7504, Issue 2, dated 15 August 1994 - Page 7 of 10 Table 1.

d-space (A)

Characteristics of analytical lines.

Relative Scan Inten- Peak Min Max sity 1 2θ1 2θ 2θ

CaliDetection bration Limit 2 Slope (µg) (ct/µg)

Precision 3 Bias 4 (% SˆrT) (%)

Comments

4.38 4.09 3.40 2.88 2.185

100 35 90 65 17

20.27 21.73 26.21 31.05 41.32

19.4 20.9 25.5 30.3 40.5

20.9 22.4 26.6 31.4 41.6

Vanadium Pentoxide (PDF # 9-0387) 4 205.0 11.5 -28.9 13 57.1 10 54.2 11.3 -22.3 9 73.0 8.3 10.1 28 24.9 -

α-Quartz interf. 20.85 °2 θ α-Quartz interf. 20.85 °2 θ α-Quartz interf. 26.69 °2 θ good weak; V 2O 3 interf. 41.42 °2 θ

3.65 2.70 2.47 2.18 1.83 1.69 1.43

60 80 60 20 25 100 30

24.39 33.18 36.37 41.42 49.83 54.28 65.25 5

24.75 23.5 33.5 32.5 36.8 35.7 41.7 40.6 50.4 49.3 54.5 53.3

Vanadium Trioxide (PDF # 26-278) 6 75.1 14.7 -10.1 5 78.3 16.0 0.0 9 70.6 15.6 14.2 62 11.7 21 30.2 5 91.2 20.7 -10.1

good AgCl interf. 32.32 °2 θ α-Quartz interf. 36.53 °2 θ weak; V 2O 5 interf. 41.32 °2 θ weak good

5.88 4.90 4.14 3.77 3.164 2.912 2.628

50 75 95 40 100 60 45

15.07 18.10 21.46 23.60 28.21 6 30.74 34.12

14.3 17.7 21.0 23.1

1 2 3

4 5 6

Ammonium Metavanadate (PDF # 9-411) 15.4 7 133.8 24.0 11.4 18.2 7 101.4 26.3 -10.2 21.8 10 49.8 13.2 23.9 18 38.5 50.3 30.1 30.9 21 33.9 33.5 34.4 20 36.0 -

good good weak; V 2O 5 interf. 21.73 °2 θ weak; V 2O 5 interf. 41.32 °2 θ AgCl interf. at 27.88 °2 θ weak weak

From Reference [7], p. 979 (g = 1.5418A)°. Reference [6]. SˆrT = (GRSD 2 + 0.1667 .SRSD 2 + .05 2)½, where GRSD is the generated-sample pooled relative standard deviation, and SRSD is the spiked-sample pooled relative standard deviation. This is the estimated relative standard deviation for the total (sampling plus measurement) air-monitoring method. From generated samples. Not evaluated because of an Ag interference at 64.48 °2 θ. Not evaluated because of an AgCl interference at 27.88 °2 θ.

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94