通过一系列条件实验，设定了合理有效的水样前处理方法，仪器测定条件以及主要试剂的浓度。
A reasonable and effective prior treatment method of the water sample, apparatus conditions and the concentration of main reagents are established by doing a series of conditional experiments.
该方法最突出的优点是烟草样品不需灰化处理，烟草样品粉末与悬浮剂作用直接进样测试，节约了前处理时间和试剂。
The main advantage of this method is that the tobacco powder can be directly injected as suspended sample, and has no need for cineration in advance.
对容器污染、试剂干扰、前处理间环境污染和氮吹浓缩系统等因素的排查结果表明，氮吹浓缩系统是主要的污染源。
The process of pretreatment was confirmed by the source of some contaminants after excluding uncertainties from data processing and instrument measurement.
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