4.1 These test methods provide a practical way to measure the concentration of certain trace elements in graphite. Many end uses of graphite require that it be free of elements which may be incompatible with certain nuclear applications. Other elemental contamination can affect the rate of oxidative degradation.
4.2 These test methods allow measurement of trace amounts of contaminants with a minimal amount of costly equipment. The colorimetric procedures used are accessible to most laboratories.
4.3 Other instrumental analysis techniques are available, capable of simultaneous quantitative analysis of 76 stable elements in a single run, with detectability limits in the parts per million range. Standards are currently being developed for elemental analysis of impurities in graphite using glow discharge mass spectrometry (GDMS), inductively coupled plasma optical emission spectroscopy (ICP-OES), combustion ion chromatography (CIC).
1.1 These test methods cover the chemical analysis of graphite.
1.2 The analytical procedures appear in the following order:
8199; | Sections |
Silicon by the Molybdenum Blue (Colorimetric) Test Method | 8 to 14 |
Iron by the o-Phenanthroline (Colorimetric) Test Method | 15 to 21 |
Calcium by the Permanganate (Colorimetric) Test Method | 22 to 28 |
Aluminum by the 2-Quinizarin Sulfonic Acid Test Method | 29 to 35 |
Titanium by the Peroxide (Colorimetric) Test Method | 36 to 43 |
Vanadium by the 3,3′-Dimethylnaphthidine (Colorimetric) | 44 to 51 |
Boron by the Curcumin-Oxalic Acid (Colorimetric) Test Method ......ASTM C560-15 history
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