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。
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.
这些实验结果表明，电导法确是一种检测土壤—水体系中离子反应平衡时间的简易手段。
These experimental results show that conductometry is indeed a simple means to determine time it takes for ions to reach equilibrium in reaction in the soil-water system.
用GC／MS多离子（MID）检测法，探讨了黄瓜中农药多残留分析问题。
Pesticides multiresidue analyses method in cucumber was studied by GC/MS with MID (Multiple Ion Detection).
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