Plastics—Phenol formaldehyde mouldings—Determination of free ammonia and ammonium compounds—Colorimetric comparison method
IDT ISO 120:1977
全国塑料标准化技术委员会热固性塑料分技术委员会(SAC/TC 15/SC 11)
本标准规定了半定量测定酚醛模塑制品中氨含量的比色法。注： 本标准不适用氨的绝对量的测定。
当必须考虑由于与模塑制品接触而引起金属嵌件的腐蚀或食物污染时，测定模塑制品氨的含量尤为重要。
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