ISO 17322:2015规定了测定总氮质量分数、一日溶出率（1DDR）、七日溶出率（7DDR）、硫质量分数、缩二脲质量分数、水质量分数（H2O）和SCU粒度的分析方法。 这些方法适用于SCU。

ISO 17322:2015 specifies analytical methods for the determination of mass fraction of total nitrogen, one-day dissolution rate (1DDR), seven-day dissolution rate (7DDR), mass fraction of sulfur, mass fraction of biuret, mass fraction of water (H₂O), and particle size of SCU. These methods are applicable to SCU.