Page:NIOSH Manual of Analytical Methods - 9000.pdf/6

 CHRYSOTILE ASBESTOS (BULK): METHOD 9000, Issue 2, dated 15 August 1994 - Page 6 of 6 [6] [7]

Williams, D. D. Direct Quantitative Diffractometric Analysis, Anal. Chem., 31:1841 (1959). Abell, M. T., D. D. Dollberg, B. A. Lange, R. W. Hornung and J. C. Haartz. Absorption Corrections in X-ray Diffraction Dust Analyses: Procedures Employing Silver Filters, Electron Microscopy and X-ray Applications, V. 2, 115, Ann Arbor Science Publishers, Inc. (1981). Dollberg, D. D., M. T. Abell, and B. A. Lange. Occupational Health Analytical Chemistry: Quantitation Using X-Ray Powder Diffraction, ACS Symposium Series, No. 120, 43 (1980).

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METHOD REVISED BY: M. T. Abell, NIOSH/DPSE.

TABLE 1. ABSORPTION CORRECTION FACTOR AS A FUNCTION OF TRANSMITTANCE FOR SOME CHRYSOTILE-SILVER PEAK COMBINATIONS. f( T) Transmittance T 1.00 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91 0.90 0.89 0.88 0.87 0.86 0.85 0.84 0.83 0.82 0.81 0.80 0.79 0.78 0.77 0.76 0.75 0.74 0.73 0.72 0.71 0.70

Chrysotile Silver

12.08 38.12

24.38 38.12

1.0000 1.0157 1.0317 1.0480 1.0647 1.0817 1.0991 1.1168 1.1350 1.1535 1.1724 1.1917 1.2114 1.2316 1.2522 1.2733 1.2948 1.3168 1.3394 1.3624 1.3859 1.4100 1.4346 1.4598 1.4856 1.5120 1.5390 1.5666 1.5949 1.6239 1.6536

1.0000 1.0078 1.0157 1.0237 1.0319 1.0402 1.0486 1.0572 1.0659 1.0747 1.0837 1.0928 1.1021 1.1115 1.1212 1.1309 1.1409 1.1510 1.1613 1.1718 1.1825 1.1933 1.2044 1.2157 1.2272 1.2389 1.2508 1.2630 1.2754 1.2881 1.3010

Transmittance T 0.69 0.68 0.67 0.66 0.65 0.64 0.63 0.62 0.61 0.60 0.59 0.58 0.57 0.56 0.55 0.54 0.53 0.52 0.51 0.50 0.49 0.48 0.47 0.46 0.45 0.44 0.43 0.42 0.41 0.40

f( T) 12.08 24.38 38.12 38.12 1.6839 1.7151 1.7470 1.7797 1.8132 1.8475 1.8827 1.9188 1.9558 1.9938 2.0328 2.0728 2.1139 2.1560 2.1993 2.2438 2.2895 2.3365 2.3848 2.4344 2.4855 2.5380 2.5921 2.6478 2.7051 2.7642 2.8251 2.8879 2.9526 3.0195

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

1.3142 1.3277 1.3414 1.3555 1.3698 1.3845 1.3995 1.4148 1.4305 1.4465 1.4629 1.4797 1.4969 1.5145 1.5325 1.5510 1.5700 1.5895 1.6095 1.6300 1.6510 1.6727 1.6950 1.7179 1.7414 1.7657 1.7907 1.8165 1.8431 1.8705