雾化气流量对ICP-AES测定钾长石中钾、钠、钙、镁、铝、铁和钛的影响  

Effect of nebulization gas flow on determination of potassium,sodium,calcium,magnesium,aluminum,iron and titanium in potash feldspar by ICP-AES

作　　者：曹立峰[1,2] 连文莉[1,2] 于亚辉[1,2] 

机构地区：[1]河南省岩石矿物测试中心,河南郑州450012 [2]国土资源部贵金属分析与勘查技术重点实验室,河南郑州450012

出　　处：《冶金分析》2014年第11期73-76,共4页Metallurgical Analysis

摘　　要：采用氢氟酸、盐酸、硝酸、高氯酸分解样品,电感耦合等离子体原子发射光谱法（ICP-AES）同时测定钾长石中CaO、MgO、Al2O3、Fe2 O3、TiO2、K2O、Na2O.在选择待测元素的分析谱线及背景校正方式基础上,考察了雾化气流量分别在1.0、0.6、0.5、0.4 L/min时对钾、钠、钙、镁、铝、铁、钛等元素的谱线强度、测定结果的精密度以及校准曲线线性影响.当雾化气流量为0.4 L/min和0.5 L/min时各元素测定结果的精密度最好,校准曲线线性相关系数均大于0.999;但雾化气流量为0.5 L/min时各元素谱线强度最高,因此选择雾化气流量为0.5L/min.根据确定的雾化气流量,用ICP-AES对GBW03116钾长石标准物质中上述6种组分进行测定,测定值与认定值的相对误差（RE）在-3.64％～4.26％之间,RSD（n=11）为0.76％～4.2％.The sample was decomposed with hydrofluoric acid, hydrochloric acid, nitric acid and perchloric acid. Then, the content of CaO, MgO, Al2O3, Fe2O3, TiO2, K2O and NaO in potash feldspar was simultaneously determined by inductively coupled plasma atomic emission spectrometry （ICP-AES）. The analysis lines for testing elements and the method for background correction were selected. The effect of nebulization gas flow （1.0, 0.6, 0.5 and 0.4 L/min） on the spectral intensity, determination precision and calibration curve linearity of potassium, sodium, calcium, magnesium, aluminum, iron and titanium was investigated. The results showed that the determination precision of elements was best when the nebulization gas flow was 0.4 L/min and 0.5 L/min. The linear correla- tion coefficients of calibration curves were all higher than 0. 999. However, the spectral intensities of elements were highest when the nebulization gas flow was 0.5 L/min. Therefore, the nebulization gas flow was selected as 0. 5 L/min. The proposed method was applied to the determination of six components （CaO, MgO, Al2O3, Fe2O3, TiO2, K2O and Na2O） in certified reference materials of potash feldspar （GBW03116）. The relative error （RE） between found results and certified values was between -3. 64% and 4. 26%. The relative standard deviation （RSD, n=11） was 0. 76%-4. 2%.

关 键 词：电感耦合等离子体原子发射光谱法(ICP-AES) 钾长石 雾化器流量 

分 类 号：P575[天文地球—矿物学] O657.31[天文地球—地质学]