Esta página en Español ELEMENTS by ICP (Nitric/Perchloric Acid Ashing) MW: Table 1
CAS: Table 2
METHOD: 7300, Issue 3
7300
RTECS: Table 2
EVALUATION: PARTIAL
Issue 1: 15 August 1990 Issue 3: 15 March 2003
PROPERTIES: Table 1
OSHA: Table 2 NIOSH: Table 2 ACGIH: Table 2 ELEMENTS: aluminum* antimony* arsenic barium beryllium* cadmium
- Some compounds
calcium lanthanum nickel chromium* lithium* potassium cobalt* magnesium phosphorus copper manganese* selenium iron molybdenum* silver lead* of these elements require special sample treatment.
SAMPLING
strontium tellurium tin thallium titanium
tungsten* vanadium* yittrium zinc zirconium*
MEASUREMENT
SAMPLER:
FILTER (0.8-µm, cellulose ester membrane, or 5.0-µm, polyvinyl chloride membrane)
TECHNIQUE:
INDUCTIVELY COUPLED ARGON PLASMA, ATOMIC EMISSION SPECTROSCOPY (ICP-AES)
FLOWRATE:
1 to 4 L/min
ANALYTE:
elements above
VOL-MIN: -MAX:
Table 1 Table 1
ASHING REAGENTS:
SHIPMENT:
routine CONDITIONS:
SAMPLE STABILITY:
stable
BLANKS:
2 to 10 field blanks per set
ACCURACY
conc. HNO3 / conc. HClO4 (4:1), 5 mL; 2mL increments added as needed room temperature, 30 min; 150 °C to near dryness
FINAL SOLUTION:
4% HNO3 , 1% HClO4 , 25 mL
WAVELENGTH:
depends upon element; Table 3
BACKGROUND CORRECTION:
spectral wavelength shift
RANGE STUDIED:
not determined
CALIBRATION:
elements in 4% HNO 3 , 1% HClO4
BIAS:
not determined
RANGE:
varies with element [1]
OVERALL PRECISION (Ö r T ):
not determined
ACCURACY:
not determined
ESTIMATED LOD: Tables 3 and 4 PRECISION ( þ ):
Tables 3 and 4
APPLICABILITY: The working range of this method is 0.005 to 2.0 mg/m3 for each element in a 500-L air sample. This is simultaneous elemental analysis, not compound specific. Verify that the types of compounds in the samples are soluble with the ashing procedure selected.
INTERFERENCES: Spectral interferences are the primary interferences encountered in ICP-AES analysis. These are minimized by judicious wavelength selection, interelement correction factors and background correction [1-4].
OTHER METHODS: This issue updates issues 1 and 2 of Method 7300, which replaced P&CAM 351 [3] for trace elements. Flame atomic absorption spectroscopy (e.g., Methods 70XX) is an alternate analytical technique for many of these elements. Graphite furnace AAS (e.g., 7102 for Be, 7105 for Pb) is more sensitive.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
