Page:NIOSH Manual of Analytical Methods - 6005.pdf/4

 IODINE: METHOD 6005, Issue 2, dated 15 August 1994 - Page 4 of 4 15-L air samples with a pooled sampling and measurement precision, Sr, of 0.062. The capacity of the 100-mg charcoal front section was at least 6 mg of iodine vapor. The total variance, SˆrT, including pump error, was 0.085. Overall average recovery based on 18 samples, six at each of three levels, was 90.8%. When corrected for desorption efficiency (0.962 in the range 0.0088 to 0.03 mg I 2 per sample), the recovery was 94.3%, representing an insignificant bias. Samples stored at ambient temperature for eight days were stable with recovery of 101.6% and a precision, S r, of 0.103 based on samples analyzed on day one.

REFERENCES: [1] Dillon, H. K., M. L. Bryant and W. K. Fowler. Methods Development for Sampling and Analysis of Chlorine, Chlorine Dioxide, Bromine and Iodine: Research Report for Iodine, Contract 210-80-0067, Southern Research Institute, Birmingham, AL, (1983), available as PB83-246595 from NTIS, Springfield, VA 22161. [2] The Determination of Iodide by Ion Chromatography, Application Note 37, Dionex Corporation, Sunnyvale, CA (February, 1982). [3] Han, K., W. F. Koch and K. W. Pratt. Improved Procedure for the Determination of Iodide by Ion Chromatography with Electrochemical Detection, Anal. Chem. 59, 731-736(1987). [4] NIOSH/OSHA Occupational Health Guidelines for Chemical Hazards, U.S. Department of Health and Human Services, Publ. (NIOSH) 81-123 (1981), available as GPO Stock #017-033-00337-8 from Superintendent of Documents, Washington, DC 20402. [5] Kim, W. S., J. D. McGlothlin and R. E. Kupel. Sampling and Analysis of Iodine in the Industrial Atmosphere, Am. Ind. Hyg. Assoc. J., 43, 187-190 (1981).

METHOD REVISED BY: Mary Ellen Cassinelli, NIOSH/DPSE.

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