| |
METHODOLOGY (Technique) |
| XRD
|
IR or FTIR
|
Chemical or Colorimetric
|
Thermal Analysis
|
| Applicability |
Universal |
Coal or specific evaluated matrix |
Specific evaluated matrix |
Thermal analysis not well suited for air samples. |
| Ability to reanalyze samples |
Non-destructive |
Non-destructive to analyte, destructive to matrix |
Destructive to analyte and matrix |
Generally destructive toward matrix. |
| MSDS use |
MSDS often useful |
MSDS needed for non-evaluated matrices |
MSDS needed |
MSDS needed |
| Field information |
Type or description of operation |
Type or description of operation |
Type or description of operation |
Type or description of operation |
| Interferences |
List specific crystalline interferences known to be present
at worksite |
List chemical interferences known to be present at worksite |
List crystalline and chemical interferences known to be
present at worksite. Interferences include ionic fluorides, e.g., CaF2 |
No likely interferences except perhaps alkaline materials. |
| Information needed |
Air volume and sample mass |
Air volume and sample mass |
Air volume and sample mass |
(Bulks only) |
| Confirmation of analytes |
Confirmation readily available |
Confirmation possible |
No confirmation generally available. Bulks may be confirmed
by microscopy. |
No additional confirmation needed; very specific to quartz. |
| Ability to distinguish analogs and polymorphs |
Can analyze quartz, cristobalite, and tridymite in diverse
respirable dust matrices |
Can analyze quartz, cristobalite, and tridymite in specific
respirable dust matrices |
Can analyze but not distinguish quartz, cristobalite, and
tridymite in many respirable dust matrices |
Can analyze quartz in many bulk matrices |
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