105.12 - Respirable Materials
SRMs 1878b and 1879b are crystalline silica materials with particle size in the respirable range. They are intended for use in determining, by x-ray diffraction, the levels of respirable silica in an industrial atmosphere according to National Institute for Occupational Safety and Health (NIOSH) Analytical Method 7500 or equivalent methods.
NOTE:These SRMs are not certified for particle size.
Also see Table 105.10 Respirable Materials on Filter Media
PLEASE NOTE: The tables are presented to facilitate comparisons among a family of materials to help customers select the best SRM for their needs. For specific values and uncertainties, the certificate is the only official source.
| SRM | Description | Unit of Issue | Measurand(s) | |
| 1648a Now Selling | Urban Particulate Matter | 2 g | Certified: 25 elements, 21 PAHs, 7 PCBs Reference values: 8 elements, 54 PAHs, 16 nitro-PAHs, 46 PCBs, 34 pesticides | |
| 1649b Now Selling | Urban Dust | 2 g | Certified: 3 elements, 23 PAHs, 13 PCBs, 4 pesticides Reference values: 1 element, 38 PAHs, 16 nitro-PAHs, 49 PCBs, 34 pesticides | |
| 1650b Now Selling | Diesel Particulate Matter | 200 mg | Certified: 26 PAHs, 7 nitro-PAHs Reference values: 59 PAHs, 16 nitro-PAHs | |
| 1866b Out of Stock | Common Commercial Asbestos | set (3) | chrysotile, amosite, crocidolite | |
| 1877 Now Selling | Beryllium Oxide Powder | 20 g | 35.76 % beryllium | |
| 1878b Now Selling | Respirable Alpha Quartz (Quantitative X-Ray Powder Diffraction Standard) | 5 g | 96.73 % alpha quartz | |
| 1879b Now Selling | Respirable Cristobalite (Quantitative X-Ray Powder Diffraction Standard) | 5 g | 93.98 % cristobalite | |
| 1975 Out of Stock | Diesel Particulate Extract | 4 x 1.2 mL | Certified: 8 PAHs, 4 nitro-PAHs Reference values: 23 PAHs, 15 nitro-PAHs, mutagenicity, residue mass | |
| 2583 Now Selling | Trace Elements in Indoor Dust (Nominal Mass Fraction of 90 mg/kg Lead) | 8 g | Certified: 5 elements | |
| 2584 Now Selling | Trace Elements in Indoor Dust (Nominal Mass Fraction of 1 % Lead) | 8 g | Certified: 5 elements Reference values: 10 elements | |
| 2585 Now Selling | Organic Contaminants in House Dust | 10 g | Certified: 33 PAHs, 30 PCBs, 4 pesticides, 15 PBDEs Reference values: 33 PAHs, 12 PCBs, 10 pesticides, 3 PBDEs 5 polycyclic musks, 8 PFAAs | |
| 2786 Now Selling | Fine Atmospheric Particulate Matter (Mean Particle Diameter < 4 µm) | 100 mg to 140 mg | Certified: 25 PAHs, 2 nitro-PAHs, 2 PBDE, 8 elements Reference values: 27 PAHs, 5 nitro-PAHs, 13 elements, 3 sugars, 5 PBDE, 12 dioxins, 15 furans | |
| 2787 Now Selling | Fine Atmospheric Particulate Matter (Mean Particle Diameter < 10 µm) | 100 mg to 140 mg | Certified: 23 PAHs, 2 nitro-PAHs, 2 PBDE, 7 elements Reference values: 27 PAHs, 5-nitro-PAHs, 5 PBDE, 14 elements, 3 sugars, 12 dioxins, 15 furans | |
| 2975 Now Selling | Diesel Particulate Matter | 1 g | Certified: 10 PAHs, 7 nitro-PAHs Reference values: 36 PAHs, 9 nitro-PAHs, particle-size, total extractable mass |
301.1 - Particle Size (powder and solid forms)
These SRMs are intended for evaluating and calibrating specific types of particle size measuring instruments, including light scattering, electrical zone flow-through counters, optical and scanning electron microscopes, sedimentation systems, and wire cloth sieving devices.
SRMs 1003c, 1004b, 1017b, 1018b and 1019b each consist of soda-lime glass beads covering a particular size distribution (PSD) range. RM 8010 is a three bottle set of different sands (A, C and D), intended for use in sieving only, and covers the sieve size range from 30 mesh to 325 mesh.
SRM 659 consists of equiaxed silicon nitride particles measured using sedimentation. SRM 1978 consists of granular, irregular shaped zirconium oxide particles measured using sedimentation. SRM 1982 consists of spheroidal particles measured using scanning electron microscopy, laser scattering, and sieving.
SRM 1961 is monodisperse latex particles in a water suspension produced by the National Aeronautics and Space Administration (NASA).
RMs 8011, 8012 and 8013 are gold nanoparticles in water.
PLEASE NOTE: The tables are presented to facilitate comparisons among a family of materials to help customers select the best SRM for their needs. For specific values and uncertainties, the certificate is the only official source.
| SRM | Description | Unit Size | Particle Diameter Distribution | |
| 659 No longer available from NIST | Particle Size Distribution Standard for Sedigraph Calibration | set (5) | 0.2 to 10 µm | |
| 1003c Now Selling | Glass Beads - Particle Size Distribution | 28 g | 20 to 45 µm (635 to 325 mesh) | |
| 1004b Now Selling | Glass Beads - Particle Size Distribution | 43 g | 40 to 150 µm (270 to 120 mesh) | |
| 1017b Now Selling | Glass Beads - Particle Size Distribution (100 μm to 400 μm diameter range) | 70 g | 100 to 400 µm (140 to 45 mesh) | |
| 1018b Now Selling | Glass (Particle Size) | 87 g | 220 to 750 µm (60 to 25 mesh) | |
| 1019b Now Selling | Glass (Particle Size) | 200 g | 750 to 2450 µm (20 to 10 mesh) | |
| 1021 Now Selling | Glass ( Particle Size) | 4 g | 2 to 12 µm | |
| 1690 Now Selling | Polystyrene Spheres (Nominal Diameter 1 µm) | 5 mL | 0.895 µm | |
| 1691 Now Selling | Polystyrene Spheres (Nominal Diameter 0.3 µm) | 5 mL | 0.269 µm | |
| 1961 Now Selling | Polystyrene Spheres 30 µm Diameter Polystyrene Spheres | 5 mL | 29.64 µm | |
| 1963a Now Selling | Polystyrene Spheres (Nominal Diameter 100 nm) | 5 mL | 0.1018 µm | |
| 1964 Now Selling | Polystyrene Spheres (Nominal Diameter 60 nm) | 5 mL | 0.06039 µm | |
| 1978 Now Selling | Particles Size Distribution Standard for Gravity Sedimentation | 5 g | 0.33 to 2.19 µm | |
| 1982 Now Selling | Thermal Spray Powder – Particle Size Distribution Yttria-Stabilized Zirconia (Spheroidal) | 10 g | 10 to 150 µm | |
| 1984 Now Selling | Thermal Spray Powder - Particle Size Distribution Tungsten Carbide/Cobalt (Acicular) | 14 g | 9 to 30 µm | |
| 1985 Out of Stock | Thermal Spray Powder - Particle Size Distribution Tungsten Carbide/Cobalt (Spheroidal) | 14 g | 18 to 55 µm | |
| 8010 Now Selling | Sand for Sand Sieve Analysis | 3 x 130 g | A (30 to 100 mesh) C (70 to 200 mesh)D (100 to 325 mesh) | |
| 8011 Out of Stock | Gold Nanoparticles (Nominal 10 nm Diameter) | 2 x 5 mL | 10 nm | |
| 8012 Out of Stock | Gold Nanoparticles, Nominal 30 nm Diameter | 2 x 5 mL | 30 nm | |
| 8013 Out of Stock | Gold Nanoparticles, Nominal 60 nm Diameter | 2 x 5 mL | 60 nm | |
| 8634 Now Selling | Ethylene Tetrafluoroethylene for Particle Size Distribution and Morphology | 20 mL | highly polydisperse, irregular morphology | |
| 8988 Now Selling | Titanium Dioxide Powder - Particle Size Distribution | 6 g | 0.1 to 0.5 µm |
301.2 - Cement and Coal Fly Ash Fineness
SRM 46h is intended to determine sieve residue according to ASTM C430. Each set consists of 10 sealed vials, each containing approximately 5g of cement.
SRM 114q is intended for calibrating the Blaine fineness meter according to the latest issue of ASTM C204, to calibrate the Wagner turbidimeter according to ASTM C115, to determine sieve residue according to ASTM C430, and to verify procedure for particle size distribution by a laser diffraction method (no-standard method available). Each set consists of 20 sealed vials, each containing approximately 5g of cement.
For further information see SP 260-161 , SP 260-166 , and SP 260-169.
PLEASE NOTE: The tables are presented to facilitate comparisons among a family of materials to help customers select the best SRM for their needs. For specific values and uncertainties, the certificate is the only official source.
| SRM | Description | Unit of Issue | Properties | Value | |
| 46h Now Selling | Portland Cement Fineness Standard | 10 vials x 5 g | Sieve Residue (45 µm residue) (No. 325) Specific Surface area (Blaine) | 7.43 % 364.4 m2/kg | |
| 114q Out of Stock | Portland Cement Fineness Standard | 20 vials | Residue on 45 µm (No. 325) sieve Specific Surface area (Wagner turbidimeter) Specific Surface area (Blaine Air Permeability Apparatus) Particle Size Distribution | 0.79 % 2183 cm2 g-13818 cm2 g-11-128 µm | |
| 2689 Now Selling | Coal Fly Ash | 3 x 10 g | Sieve Residue (45 µm residue) (No. 325) | 12.8 % | |
| 2690 Now Selling | Coal Fly Ash | 3 x 10 g | Sieve Residue (45 µm residue) (No. 325) | 8.0 % | |
| 2691 Now Selling | Coal Fly Ash | 3 x 10 g | Sieve Residue (45 µm residue) (No. 325) | 10.5 % |
301.5 - Particle Count Materials (powder and suspension forms)
These SRM and RM materials are intended for use in calibrating the response of particle sizing instrumentation, including optical counters, in accordance with National Fluid Power Association (NFPA) and ISO standard methods (NFPA/T2.9.6 R2-1998, ISO/FDIS 11171, ISO/FDIS 12103) for determining particle contamination in oils. SRM 2806b is certified for particle concentration and projected area diameter. It consists of a polydisperse, irregularly-shaped mineral dust suspended in 5606 hydraulic fluid. RMs 8631b and 8632 are mineral test dusts of medium and ultrafine particle size and can be used to prepare suspensions in other types of oils.
NOTE: The same lot of medium test dust was used to produce SRM 2806b and RM 8631a, and is a derivative of Arizona Road Dust.
PLEASE NOTE: The tables are presented to facilitate comparisons among a family of materials to help customers select the best SRM for their needs. For specific values and uncertainties, the certificate is the only official source.
| SRM | Description | Unit Size | Particle Size Range | |
| 2806b Out of Stock | Medium Test Dust (MTD) in Hydraulic Fluid | 2 x 400mL | 1 μm to 30 μm | |
| 8631b Now Selling | Medium Test Dust (MTD) | 20 g | 4 µm to 40 µm | |
| 8632 Now Selling | Ultra Fine Test Dust (UFTD) | 20 g | 1 µm to 20 µm |