1.1 This test method covers the determination of a number of metals such as aluminum, antimony, barium, calcium, iron, lithium, magnesium, molybdenum, phosphorus, silicon, sodium, sulfur, and zinc in unused lubricating greases by inductively coupled plasma atomic emission spectrometry (ICP-AES) technique.1.1.1 The range of applicability for this test method, based on the interlaboratory study conducted in 2005, is aluminum (10-600), antimony (10-2300), barium (50-800), calcium (20-50 0