Page:NIOSH Manual of Analytical Methods - 1006.pdf/4

 FLUOROTRICHLOROMETHANE: METHOD 1006, Issue 2, dated 15 August 1994 - Page 4 of 4 EVALUATION OF METHOD: Method S102 was issued on October 29, 1976 [2], and validated with atmospheres generated by a cooled, calibrated syringe drive [1]. Average recovery was 0.98 with Sr = 0.046 (17 samples) in the range 2388 to 10520 mg/m 3 for 4-L samples. No significant difference in recovery was seen between samples (with or without backup sections) stored one or seven days at room temperature. In a separate experiment to check for migration, no significant difference in recovery was seen in samples stored for seven days, with and without backup sections, and no analyte was detectable in any of the backup sections. Results of breakthrough (effluent concentration = 5% of test concentration) experiments were:

Charcoal, mg 100 400 400

Breakthrough Volume, Capacity, L mg 2 10.5 6.2

25 112 63

Test Concentration, mg/m 3 12502 10660 10170

Rate L/min 0.05 0.187 0.187

Humidity, % RH 0 0 90

Ref. [3] [1] [1]

Desorption efficiency for seventeen 400-mg samples of SKC Lot 105 charcoal spiked with 10.5 to 32 mg fluorotrichloromethane averaged 1.04 with Sr = 0.063.

REFERENCES: [1]

[2] [3]

Backup Data Report for Fluorotrichloromethane, prepared under NIOSH Contract 210-76-0123, available as "Ten NIOSH Analytical Methods, Set 1," Order No. PB-271-712 from NTIS, Springfield, VA 22161. NIOSH Manual of Analytical Methods, 2nd ed., Vol. 2, S102, U.S. Department of Health, Education, and Welfare, Publ. (NIOSH) 77-157-B (1977). Failure Report S102, prepared under Contract No. CDC (NIOSH) 99-74-45 (NIOSH, unpublished, 1977).

METHOD REVISED BY: G. David Foley, NIOSH/DPSE.

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