标准摘要
[中文适用范围]： 本国际标准规定了采用凯氏定氮法测定照相冲洗废物中总有机氮以及氨氮的方法。 照相冲印废物中的总凯氏氮含量可测定为氨，范围为 10 毫克/升至 200 毫克/升，或氮含量范围为 8 毫克/升至 160 毫克/升。 如果单独测定氨氮（参见 ISO 6853）并减去，则可以确定有机氨基氮的浓度。 [外文原描述]： This International Standard specifies a method for the determination of the total organic nitrogen, as well as any ammoniacal nitrogen, present in photographic processing wastes by the Kjeldahl method. Total Kjeldahl nitrogen can be determined in photographic processing wastes in the range of 10 mg/l to 200 mg/l as ammonia, or in the range of 8 mg/l to 160 mg/l in terms of nitrogen. If ammoniacal nitrogen (see ISO 6853) is determined separately and subtracted, the concentration of organic amino nitrogen can be established.
英文名称Photography — Processing waste — Determination of total amino nitrogen (microdiffusion Kjeldahl method)