National Institute for Occupational Safety and Health

Name: NIOSH Manual of Analytical Methods — Elements by Cellulosic Internal Capsule Sampler (7306)
Author: National Institute for Occupational Safety and Health

NIOSH Manual of Analytical Methods… (1994)

Summary

“NIOSH Manual of Analytical Methods — Elements by Cellulosic Internal Capsule Sampler (7306)”, published in 1994, is a work by National Institute for Occupational Safety and Health. It explores elements such as sample, ICP-AES and Centers for Disease Control and Prevention.

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)

“ Use of an internal capsule sampler is an efficient means to account for sampler wall deposits that would otherwise be excluded by filter-only sampling. Unless other means are used to account for non-filter deposits inside the cassettes (e.g. within-cassette extraction, rinsing or wiping) , internal capsule samplers should be used. OSHA method ID-125G [10] describes ICP-AES multielement analysis after hotplate digestion using nitric acid, sulfuric acid and hydrogen peroxide. ”

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

“ With the domed top, the internal capsule can be difficult to fit into standard sample digestion vessels. One way to achieve this is to place the samplers into the vessels by bending them slightly inward (using coated forceps) and to push them into the bottom of the vessel to ensure they are covered with the digestion acids. Care must be taken to ensure that sample is not lost in this process. Additional guidance is available from the internal capsule manufacturer [19] . ”

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Source: Wikisource

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

“ When working with concentrated acids, wear protective clothing, safety goggles and gloves. All work should be performed with adequate ventilation for personnel and equipment. It is imperative that acid be added to water in order to avoid a violent exothermic reaction. SAMPLING: 1.
Calibrate each personal sampling pump with a representative sampler in line. NOTE: See NMAM guidance chapters for discussion on sampling. 2. Sample at an accurately known flow rate between 1 and 4 L/min (± 5%) for a total sample size of <1 to 2000 L (see Table 1) for TWA measurements. ”

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Source: Wikisource

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

“ Some compounds of these elements require special sample treatment. INTERFERNCES: Spectral interferences are the primary interferences encountered in ICP-AES analysis. These are minimized by judicious wavelength selection, interelement correction factors and background correction [3,4] . OTHER METHODS: The internal capsule sampler used in this method is a recommended alternative to filter-only sampling [5] of NIOSH methods 7300 [6] , 7301 [7] , 7302 [8] and 7303 [9] . ”

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Source: Wikisource

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

“ Where the background levels may pose a greater influence is in the calculation of the method LOD. Method LODs (calculated using the standard deviation of blank responses) for internal capsule samples were greater than those calculated for MCE filters alone for many of the elements [17] . Care should be taken in choosing the appropriate media in concert with the expected sample concentrations. ”

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Source: Wikisource

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

“ Calibration stock solutions, 1000 μg/L: Commercially available; or prepared per instrument manufacturer’s recommendation Dilution acid: 20% nitric acid* (7302) ; 4% nitric acid:1% perchloric acid* (7300) ; 5% aqua regia (7301) *; or 5% nitric acid: 5% hydrochloric acid* (7303) [dilution acid is dependent upon sample preparation method used] Argon, as specified by ICP-AES manufacturer Deionized water, ASTM Type II [13] or equivalent
See SPECIAL PRECAUTIONS 1.
Sampler: cellulose acetate internal capsule attached to mixed cellulose ester membrane filter, 0.8-μm pore size ”

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Source: Wikisource

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

“ US Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 2005-149. [www.cdc. gov/niosh/npg] . METHOD WRITTEN BY: Kevin Ashley, Ph.D., Ronnee N. Andrews, Ph.D., and H. Amy Feng, NIOSH/DART. Disclaimer: Mention of any company or product does not constitute endorsement by the National Institute for Occupational Safety and Health. ”

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Source: Wikisource

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

“ ASTM D7035 [11] and ISO 15202 [12] are related voluntary consensus standard ICP-AES methods for multielement sampling and analysis of workplace atmospheres.
NIOSH Manual of Analytical Methods (NMAM) , Fifth Edition ELEMENTS by Cellulosic Internal Capsule Sampler: METHOD 7306, Issue 1, dated 10 September 2015 - Page 2 of 11
REAGENTS: 1. 2. 3. 4. 5. ”

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Source: Wikisource

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

“ MEASUREMENT: 10. Set ICP-AES spectrometer to conditions specified by manufacturer. 11. Analyze standards and samples by ICP-AES in accordance with manufacturer recommendations. NOTE:
If the values for the samples are above the range of the standards, dilute the solutions (ensuring the samples remain acid matrix-matched to the calibration standards) , reanalyze and apply the appropriate dilution factor in the calculations. CALCULATIONS: 12. Obtain the solution concentrations for the sample, Cs (μg/mL) , and the average media blank , Cb (μg/mL) , from the instrument. 13. ”

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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