| 摘要: |
| 研究了用溶液吸收装置对天然气中微量金属元素进行取样,采用电感耦合等离子体
(ICP)原子发射光谱法测定其浓度的分析系统。石英材质溶液吸收装置的直径为80mm、高为130
mm,具有较低的干扰和良好的吸收效果。用10%(φ)硝酸溶液浸泡过夜处理后的样品储存瓶对测定结
果具有较低的影响。采样流量为0.5L/min时,具有较好的吸收效果和样品代表性。研究优化了ICP
发射光谱仪泵速、RF功率、雾化器气体流量、辅助气气体流量、积分时间和冲洗时间等分析条件,以及
特征波长。分析系统在此优化条件下显示出高的灵敏度(22种元素检出限从0.1 ~ 31.4μg/L)。校
准曲线在50.0~1000.0μg/L范围内显示出良好的线性。该分析系统吸收效率高、结构简单、尺寸
小、操作简便、测定范围宽、检出限低,是一种有潜力的天然气中微量金属元素测定系统 |
| 关键词: 天然气 微量金属 原子发射光谱 电感耦合 |
| DOI：10.3969/j.issn.1007-3426.2016.04.017 |
| 分类号: |
| 文献标识码:A |
| 基金项目: |
|
| Researchontheanalyticalsystemfordeterminationoftracemetalsinnaturalgasusinginductivelycoupledplasmaatomicemissionspectrometry |
|
WangYujie1,2, TuZhenquan1,2, ChiYongjie1,2, ZhouLizhi1,2, ZhuHuadong1,2
|
|
1.ResearchInstituteof NaturalGasTechnology,PetroChinaSouthwestOil& GasfieldCompany,
Chengdu610213,China;2.KeyLaboratoryof NaturalGasQualityandEnergy Measurement,
CNPC,Chengdu610213,China
|
| Abstract: |
| flow,auxiliarygasflow,integrationtimeandrinsingtime,aswellascharacteristicwavelength,the
analysissystemexhibitshighsensitivity(thedetectionlimitsof22elementsfrom0.1-31.4μg/L).
Thecalibrationcurveisagoodlinearityintherangeof50.0-1000.0μg/L.Thefeaturesofthe
developedsystemincludehighabsorptionefficiency,simplestructure,smallsize,easyoperation,
widemeasurementrange,andlowdetectionlimitwithapotentialfordeterminationoftracemetalsin
naturalgas.Abstract:Aneffectiveanalysissystembasedonsamplingwithsolutionabsorptiondeviceisstudied
forthedeterminationoftracemetalsinnaturalgasbyinductivelycoupledplasmaatomicemission
spectrometry(ICP-AES).Thequartzabsorptiondevicewithdiameterof80 mmandheightof130
mm showsalowerinterferenceand high absorption.Thestoringsamplebottleaftersoaking
overnightwith10%nitricacidsolutionhasalowerimpactonthemeasurementresults.Thesampling
flowof0.5L/mindisplaysabetterabsorptioneffectandgoodrepresentativesample.Underthe
optimizedexperimentalconditionsofICP-AES,suchasthepumpspeed,RFpower,nebulizergas |
| Key words: naturalgas,tracemetal,atomicemissionspectrometry,inductivecoupling |
