我国车用汽油中硫含量控制指标及测定方法

Sulfur content control index and determination methods of motor gasoline in China

关键词:  汽油  硫含量  指标  测定方法 

Key words:  gasoline  sulfur content  index  analytical method

摘要:

综述了我国车用汽油中硫含量的控制指标和测定方法。我国车用汽油标准从1999年开始历经了国Ⅰ标准、国Ⅱ标准、国Ⅲ标准、国Ⅳ标准和国Ⅴ标准5个阶段,目前已全面实施国Ⅳ标准,2018年起将全面实施国Ⅴ标准,硫含量控制指标从2000年以前的不大于1 500 mg/kg降低到目前的不大于50 mg/kg,2018年起将全面实施不大于10 mg/kg的控制指标。对燃灯法、紫外荧光法、氧化微库仑法、能量色散X射线荧光法、波长色散X射线荧光法等硫含量测定的常用方法的特点、测定限值、重复性、采用情况等作了论述,提出今后研究的方向为气相色谱-选择性检测器联用法,并对其进行了论述。 

Abstract:

The paper summarized the sulfur content control index and determination methods of motor gasoline in China. The standard of motor gasoline in China has experienced five stages from the national Ⅰ level standard to the national V level standard since 1999. The national Ⅳ level standard has fully implemented and the national V level standard will be fully implemented from 2018 onwards:the sulfur content control index has been decreased from no more than 1 500 mg/kg to no more than 50 mg/kg; and the control index of no more than 10 mg/kg will be fully implemented from 2018 onwards. The conventional methods, including lamp method, ultraviolet fluorescence method, oxidative microcoulometric method, energy dispersive X-ray fluorescence spectrometry method and wavelength dispersive X-ray fluorescence spectrometry method, were described in the aspects of characteristic, determination limit, repeatability and the condition of adoption. The developmental trend of research was gas chromatography-selective detectors methods and these methods were also described.