A new method for determination of melamine in milk powder and milk products by gas chromatography-mass spectrum with selected ion monitor(GC-MS/SIM) was established in this paper.
采用气相色谱-质谱（GC-MS）分析技术，选择离子检测法（SIM），开发出一种准确可靠、灵敏度高的测定奶粉及奶制品中三聚氰胺的新方法。
Another way to talk about different types is to think about which ion they're selected for.
另一种方法是通过，看它们是针对哪种离子的。
Ford Motor Company has selected Compact Power Incorporated (CPI), a subsidiary of LG Chem, to build lithium-ion battery packs for the Ford Focus Electric, which will go on sale in the us in 2011.
福特汽车公司决定选择LG化工子公司CompactPower公司(CPI)为其即将在美国2011年销售的福克斯电动车制造锂离子电池组。
Either diatomite or ion exchange resin can be selected as regenerator according to customer's requirement.
根据用户需要可以采用硅藻土过滤器或离子交换树脂过滤器作为再生过滤器。
In addition, various ferric ion stabilizers were evaluated and suitable ferric ion stabilizer was selected.
还评价了各种铁离子稳定剂，选出合适的铁离子稳定剂。
The aerosol sample was extracted by ultrasonic technique and 16 of the PAH's were determined, in priority, as proposed by EPA, by GC-MS with selected-ion monitoring (SIM).
超声波抽提气溶胶样品，用GC - MS的选择离子监测(SIM)方式测定EPA提出的优先监测的16种多环芳烃的含量。
Methods Selected acid polymeric monomers were melted with polymeric monomers of good polarity, effusion and thawing power and with water that can produce ion combination reaction against carboxyl.
方法选用三种酸性可聚合单体，配合极性、渗透性好的、助溶力强的可聚合单体及使羧基可离子化的水等组成的自酸蚀黏接体系并进行了黏接强度测试。
Methods Selected acid polymeric monomers were melted with polymeric monomers of good polarity, effusion and thawing power and with water that can produce ion combination reaction against carboxyl.
方法选用三种酸性可聚合单体，配合极性、渗透性好的、助溶力强的可聚合单体及使羧基可离子化的水等组成的自酸蚀黏接体系并进行了黏接强度测试。
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