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 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