Trace Constituent Elements in Blank Filters


SRMs 2678 and 2681 are for use in evaluating the performance of air sampling filter methods with either certified values (in µg) or limits of detection (XD


) for each of 30 constituent elements, as well as six leachable anions and cations. SRM Description


2678 Cellulose Acetate Membrane 2681 Ashless Blank Filter


Diameter (mm) 47


42.5


Pore Size (µm) Filter Weight (g) 0.45


—


0.09 0.14


Respirable Silica


These SRMs are intended for use in determining, by X-ray diffraction, the levels of respirable silica in an industrial atmosphere according to the National Institute for Occupational Safety and Health (NIOSH) Analytical Method 7500 or equivalent methods.


SRM Description


1878a Respirable Alpha Quartz 1879a Respirable Cristobalite


2950 Respirable Alpha Quartz on Filter Media 2951 Respirable Alpha Quartz on Filter Media 2952 Respirable Alpha Quartz on Filter Media 2953 Respirable Alpha Quartz on Filter Media 2954 Respirable Alpha Quartz on Filter Media 2955 Respirable Alpha Quartz on Filter Media 2956 Respirable Alpha Quartz on Filter Media 2957 Respirable Alpha Quartz on Filter Media 2958 Respirable Alpha Quartz on Filter Media


Mass Fraction/Mass Loading Unit Size 93.7% ± 0.21%


88.2% ± 0.4%


5 g 5 g


(10, 20, 50, 100, 250, 500) µg/filter set SRMs 2952-57 5 µg/filter 10 µg/filter 20 µg/filter 50 µg/filter 100 µg/filter 250 µg/filter 500 µg/filter 1000 µg/filter


5 filters (5 blanks) 5 filters (5 blanks) 5 filters (5 blanks) 5 filters (5 blanks) 5 filters (5 blanks) 5 filters (5 blanks) 5 filters (5 blanks) 5 filters (5 blanks)


2960 Respirable Alpha Cristobalite on Filter Media (5, 10, 20, 50, 100, 250) µg/filter set SRMs 2961-66 2961 Respirable Alpha Cristobalite on Filter Media 5 µg/filter 2962 Respirable Alpha Cristobalite on Filter Media 10 µg/filter 2963 Respirable Alpha Cristobalite on Filter Media 20 µg/filter 2964 Respirable Alpha Cristobalite on Filter Media 50 µg/filter 2965 Respirable Alpha Cristobalite on Filter Media 100 µg/filter 2966 Respirable Alpha Cristobalite on Filter Media 250 µg/filter 2967 Respirable Alpha Cristobalite on Filter Media 500 µg/filter


5 filters (5 blanks) 5 filters (5 blanks) 5 filters (5 blanks) 5 filters (5 blanks) 5 filters (5 blanks) 5 filters (5 blanks) 5 filters (5 blanks)


WWW.NIST.GOV/SRM  (301) 975-2200  FAX: (301) 948-3730  EMAIL: SRMINFO@NIST.GOV


41


ENVIRONMENTAL


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