“…Following extraction, a sample of the methylene chloride wash of the glass was collected and analyzed by FT-IR and compared with a blank of the methylene chloride. No sign of any oil or grease contamination, as observed for an earlier glass sample 10 , was noted. Results indicate that the dissolutions were complete (95 ≤ sum of oxides ≤ 105) and the analytical procedures were performed correctly (multi-element standards measured within ten percent of the standards values).…”