Study of the Rapid Determination of Phosphorus in Electronic Packaging Material by Phosphorus-Molybdenum Yellow Spectrophotometry

Phosphorus (P) plays a crucial role in enhancing the properties of electronic packaging materials, making the selection of a reliable method for rapid detection of P elements a vital task. This study introduces phosphorus-molybdenum yellow spectrophotometry as an effective detection method for the precise and quick control of P content in electronic packaging materials, thereby boosting detection efficiency. Copper-silver-phosphorus (Cu-Ag-P) alloys were selected as the experimental material. A standard curve was constructed using specific parameters: a wavelength of 420 nm, 6 mL of nitric acid solution, 3 mL of ammonium metavanadate solution, 5 mL of ammonium molybdate solution, and a reaction time of 45 min. The results showed that the standard curve complied with the Beer-Lambert Law within a P content range of 0-7%. In comparison to detection results using inductively coupled plasma atomic emission spectrometry (ICP-AES), phosphorus-molybdenum yellow spectrophotometry was found to be simple in principle, convenient in operation, and low in cost. Thus, it is suitable for practical production detection of Cu-Ag-P alloy.