化学分析计量
化學分析計量
화학분석계량
CHEMICAL ANALYSIS AND METERAGE
2015年
4期
52-54
,共3页
罗骁%毕锡斌%陆克平
囉驍%畢錫斌%陸剋平
라효%필석빈%륙극평
车用尿素%Ca2+%离子色谱法%非抑制电导检测
車用尿素%Ca2+%離子色譜法%非抑製電導檢測
차용뇨소%Ca2+%리자색보법%비억제전도검측
automobile urea%Ca2+%ion chromatography%non-suppressed conductance detection
建立了离子色谱直接进样测定车用尿素溶液中Ca2+的方法。选择Metro sep C3–250型色谱柱，以5 mmol／L硝酸为淋洗液，非抑制电导检测模式。Ca2+质量浓度在0.05~1.0μg／mL范围内与色谱峰面积呈良好线性，相关系数r=0.9998，实际样品的定量限为0.025μg／mL，0.10μg／mL水平Ca2+加标回收率为97.44%，相对标准偏差为4.68%(n=6)，可满足ISO 22241标准中Ca2+的分析要求。该法具有无试剂干扰、操作简便、分析速度较快的特点，检测结果与ISO 22241标准中ICP–OES方法无显著性差异。
建立瞭離子色譜直接進樣測定車用尿素溶液中Ca2+的方法。選擇Metro sep C3–250型色譜柱，以5 mmol／L硝痠為淋洗液，非抑製電導檢測模式。Ca2+質量濃度在0.05~1.0μg／mL範圍內與色譜峰麵積呈良好線性，相關繫數r=0.9998，實際樣品的定量限為0.025μg／mL，0.10μg／mL水平Ca2+加標迴收率為97.44%，相對標準偏差為4.68%(n=6)，可滿足ISO 22241標準中Ca2+的分析要求。該法具有無試劑榦擾、操作簡便、分析速度較快的特點，檢測結果與ISO 22241標準中ICP–OES方法無顯著性差異。
건립료리자색보직접진양측정차용뇨소용액중Ca2+적방법。선택Metro sep C3–250형색보주，이5 mmol／L초산위림세액，비억제전도검측모식。Ca2+질량농도재0.05~1.0μg／mL범위내여색보봉면적정량호선성，상관계수r=0.9998，실제양품적정량한위0.025μg／mL，0.10μg／mL수평Ca2+가표회수솔위97.44%，상대표준편차위4.68%(n=6)，가만족ISO 22241표준중Ca2+적분석요구。해법구유무시제간우、조작간편、분석속도교쾌적특점，검측결과여ISO 22241표준중ICP–OES방법무현저성차이。
Calcium ion in automobile urea solution was determined by ion chromatography with non-suppressed con-ductance, Metro sep C 3–250 as separation column and 5 mmol/L nitric acid as the eluent. The concentration of Ca2+was linear with chromatographic peak area in the range of 0.05–1.0 μg/mL with the correlation coefficent of 0.999 8. The re-covery rate of 97.44%was reached with 0.10 μg/mL calcium ion, and the relative standard deviation was 4.68%(n=6). The detection limit of actual samples was 0.025 μg/mL. Both the accuracy and precision of the method could meet the require-ment of ISO 22241. The method provided with no reagent interference as well as complex operations. The results detected by IC and ICP–OES were no significant difference.
