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In addition to the various standard samples, a large variety of reference samples are also available. In general the reference samples either have less accurately known compositions or they are primarily designed for other purposes but can be useful in spectrochemical analysis. The materials are particularly applicable to semiquantitative analysis, identification of alloy types, and for estimation of element concentrations in a wide variety of materials Some 1200 materials are referred to in this report and include: 1. Semiquantitative samples from three sources containing about 50 elements in a variety of matrices, 2. Several sets of rod samples for calibration of visual spectroscopes, 3. Nominal composition materials of nickel, 4. Metal powders, 5. Indium metal samples, and 6. Analyzed materials for commercial products, rocks, ores (synthetic), and metals and alloys. A more detailed description of the reference samples follows.