SH/T 0657-2007 in English

对于液态石油烃中氮含量大于100mg/kg的样品，SH/T 0704方法更为适用。由实验室之间的协作试验研究表明，对于超出方法规定范围的样品，通过选择适当的溶剂将样品的氮含量和粘度范围稀释至方法规定的范围后，本方法也可适用。然而，操作人员应核查试样在溶剂中的溶解度，并确认用注射器直接将稀释度样注入炉中时，不会因试样或溶剂在针管内的热解而造成测量结果偏低。

Scope

1.1 This standard specifies the method for determination of total nitrogen content in liquid petroleum hydrocarbons. This standard is suitable for the determination of naphtha, petroleum fractions and other oils with a boiling point range of 50 ℃ ~ 400 ℃, a viscosity range of about 0.2mm/s ~ 10mm/s at room temperature, and a total nitrogen content of 0.3mg/kg ~ 100mg/kg. Taste. 1.2 For samples with a total nitrogen content greater than 100 mg/kg in liquid petroleum hydrocarbons, the SH/T 0704 method is more applicable. Collaborative experimental studies between laboratories have shown that this method can also be applied to samples outside the range specified by the method by selecting an appropriate solvent to dilute the nitrogen content and viscosity range of the sample to the range specified by the method. However, the operator should check the solubility of the sample in the solvent and confirm that when the diluted sample is injected directly into the furnace with a syringe, the measurement results will not be lower due to pyrolysis of the sample or solvent in the needle tube. 1.3 This standard uses International System of Units [SI] units. 1.4 This standard covers certain hazardous materials, operations and equipment, but is not intended to provide recommendations on all safety issues related thereto. Therefore, users should establish appropriate safety and protective measures and determine the applicable management system before using this standard.