National Institute for Occupational Safety and Health

Name: NIOSH Manual of Analytical Methods — Elements by ICP (Microwave Digestion) (7304)
Author: National Institute for Occupational Safety and Health

NIOSH Manual of Analytical Methods… (1994)

Summary

“NIOSH Manual of Analytical Methods — Elements by ICP (Microwave Digestion) (7304)”, published in 1994, is a work by National Institute for Occupational Safety and Health. It explores elements such as ICP-AES, filters and acid.

Quotes from NIOSH Manual of Analytical Methods… (National Institute for Occupational Safety and Health)

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ All work should be performed with adequate ventilation to personnel and equipment. Because this method involves the use of capped digestion containers, avoid the use of other acids such as perchloric acid in combination with nitric acid that could cause a violent reaction [1,9] . In the preparation of the digestion and dilution acid, it is imperative that acid be added to water in order to avoid a violent exothermic reaction. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ This method is for the analysis of metal and nonmetal dust collected on PVC filters that are also used for gravimetric analysis. This is a simultaneous elemental analysis using a microwave digestion approach to simplify and expedite the analysis. Some elements such as antimony, silver, and tin do not form stable solutions in nitric acid when chloride from the PVC filters is present. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ Values reported were obtained with a Fisons ARL Accuris ICP-AES or a Perkin Elmer Optima 3000 DV ICP-AES. (2) Lowest level in range studied at which recoveries were between 81 and 121% recovery and relative standard deviation (Sr) less than 0.1100 on 5 or 6 replicates. Performance may vary with instrument and should be independently verified.
NIOSH Manual of Analytical Methods (NMAM) , Fifth Edition ELEMENTS by ICP (Microwave Digestion) : METHOD 7304, Issue 1, dated 25 June 2014 - Page 11 of 11
Table 4. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ Check recoveries with at least one media blank and two spiked media blanks per twenty samples. Use a spike level that is within the range of 10 to 20 times the Limit of Quantitation (LOQ.) NOTE:
Whenever possible, QA/QC samples should be prepared from certified reference materials in a matrix similar to the bulk material sampled. Liquid spiked filters are only surrogates for real world samples and QC data based upon certified samples would be ideal. MEASUREMENT: 13.
Set the ICP-AES spectrometer to conditions specified by manufacturer. 14. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ Sample at an accurately known flow rate between 1 and 4 L/min. For estimated sampling volumes see Table 1. For TWA measurements see Table 2. Do not exceed a filter loading of approximately 2 mg total dust. NOTE: Filter overloading can be assessed by periodic visual checks. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ Massachusetts Institute of Technology wavelength tables, 2nd ed. West Hanover, MA: Halliday Lithograph, Volume 1. [6] ASTM International [2010] . ASTM D7035, Standard test method for the determination of metals and metalloids in airborne particulate matter by inductively coupled plasma atomic emission spectrometry. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ METHOD 7304, Issue 1, dated 25 June 2014 - Page 3 of 11
NOTE:
In order to avoid a violent exothermic reaction, do not add water to concentrated nitric acid. Acid should be added after the water has been placed in the vessel. 5.
Place digestion vessels in microwave and run preprogrammed PVC digestion procedure. Example microwave conditions for 12-vessel digestion: 1200 W power, ramp to 215 °C over 20 min, hold for 10 min at 215 °C followed by at least a 5 min cool down (power will be adjusted lower for fewer vessels) . 6.
Allow the samples to cool to room temperature. 7. ”

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Source: Wikisource

National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)

“ U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health. DHHS (NIOSH) Publication No. 94-113. [12] Stone LC, Perkins JB, Rogers DM [2003] . Backup data report NMAM 7304: Elements by ICP on PVC filters using microwave digestion. Cincinnati OH: DataChem Laboratories, Inc. under NIOSH contract CDC-200-2001-08000. ”

National Institute for Occupational Safety and Health

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Quotes from NIOSH Manual of Analytical Methods… (National Institute for Occupational Safety and Health)

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