总氮量 meaning in English

nitrogen content
total nitrogen

Test method for determining total nitrogen in resins and plastics
树脂和塑料中总氮量的测试方法
Chemical reagent - general method for the determination of total nitrogen
化学试剂总氮量测定通用方法
Standard test method for total nitrogen in lubricating oils and fuel oils by modified kjeldahl method
用改进的克椰达方法测定润滑油及燃料油中总氮量的标准试验方法