王小利,施秀華,劉曉曉,龐 琳
(多氟多化工股份有限公司,河南焦作454191)
Abstract:The determination of the contents ofmetal ions(nickel,cobalt,manganese,lithium,sodium,iron,and copper)in nickel cobalt lithiummanganatebymicrowave plasma spectrometer(MP-AES)was studied.The experimental results showed thatwhen selecting theappropriate sample pretreatmentway and optimum instrumentoperation conditions,thedetection limit of thismethod could reach 0.002~0.021mg/kg,and the recovery ratewasat95%~105%,whichmet the requirements of the method.Compared with the atomic absorption spectrometer,MP-AES had better stability.At the same timemulti elements could be determined simultaneously which greatly improved thework efficiency.Compared with inductively coupled plasma atomic emission spectrometry(ICP-OES),ithad a lower cost.Therefore,it is amore scientific,more accurate andmore efficient testing instrument.
Key words:microwave plasma spectrometer;lithium nickelcobaltmanganese;metal ions
MP-AES測定鎳鈷錳酸鋰中金屬離子含量的應用
王小利,施秀華,劉曉曉,龐 琳
(多氟多化工股份有限公司,河南焦作454191)
采用微波等離子體原子發射光譜儀(MP-AES)測定鎳鈷錳酸鋰中金屬離子(鎳、鈷、錳、鋰、鈉、鐵、銅)含量。實驗結果表明,選擇合適的樣品前處理方式和最佳的儀器操作條件,方法的檢出限可達到0.002~0.021mg/kg、加標回收率達到95%~105%,滿足了方法的要求。MP-AES與原子吸收光譜儀相比,具有更好的穩定性,同時能多元素同時測定,大大提高了工作效率;與電感耦合等離子體原子發射光譜儀(ICP-OES)相比,降低了成本。因此,MP-AES是一種更加科學、準確、高效的檢測儀器。
微波等離子體原子發射光譜儀;鎳鈷錳酸鋰;金屬離子
Abstract:The determination of the contents ofmetal ions(nickel,cobalt,manganese,lithium,sodium,iron,and copper)in nickel cobalt lithiummanganatebymicrowave plasma spectrometer(MP-AES)was studied.The experimental results showed thatwhen selecting theappropriate sample pretreatmentway and optimum instrumentoperation conditions,thedetection limit of thismethod could reach 0.002~0.021mg/kg,and the recovery ratewasat95%~105%,whichmet the requirements of the method.Compared with the atomic absorption spectrometer,MP-AES had better stability.At the same timemulti elements could be determined simultaneously which greatly improved thework efficiency.Compared with inductively coupled plasma atomic emission spectrometry(ICP-OES),ithad a lower cost.Therefore,it is amore scientific,more accurate andmore efficient testing instrument.
Key words:microwave plasma spectrometer;lithium nickelcobaltmanganese;metal ions
隨著中國新能源行業的發展,作為新能源鋰電池正極材料之一[1]的鎳鈷錳酸鋰產品的質量直接影響著鋰電池的性能和發展,準確快速地檢測鎳鈷錳酸鋰中鎳、鈷、錳、鋰、鈉、鐵、銅元素的含量對生產高品質的鋰電池具有重要的指導意義,因此建立準確、簡捷的鎳鈷錳酸鋰中金屬元素含量的測定方法具有重要的實際應用意義。目前,原子吸收光譜法測定鎳鈷錳酸鋰中金屬元素含量是各元素分別測定,過程繁瑣,工作效率低,而且鈉、鐵、銅等低含量元素的測定存在譜線干擾多、檢出限高、穩定性不好等缺點。雖然電感耦合等離子體原子發射光譜儀(ICPOES)具有檢測線性范圍寬(質量分數為1×10-8~1× 10-4)、檢出限低、效率高等優點,測定低含量元素時可以滿足檢測要求,但是測定鎳鈷錳酸鋰中鎳、鈷、錳、鋰幾種高含量元素時,稀釋倍數大、誤差大,而且ICP-OES需要使用高純氬氣,檢測成本高[2]。……