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FIA技术发展初期即被应用于植物全氮量的测定,相继国内也发表了土壤全氮FIA比色法。有关电极测定土壤全氮FIA方法至今尚未见报导,固膜电极FIA技术发表后,又对水作载流合并带法氨敏电极直接测定土壤消化液全氮量的装置及测定条件进行了试验,并取得较满意的结果。 1.仪器和试剂:(1)八通道蠕动泵,(2)双通道取样阀(本所自制),(3)ZD-2型pH-mV计,(4)记录仪(满程10～20mV),(5)氨敏电极(Orion-95-10型),(6)远红外消
In the early stage of FIA technology, it was applied to the determination of total nitrogen in plants, and soil total nitrogen FIA colorimetry has also been published in China. However, no report has been reported yet on the determination of soil total nitrogen FIA by electrode. After the FIA technology was published, the device and the measurement conditions for direct determination of total nitrogen in soil digestion solution by current-carrying amperometric ammonia- And get more satisfactory results. 1. Instruments and reagents: (1) eight-channel peristaltic pump, (2) dual-channel sampling valve (made in Japan), (3) ZD-2 pH-mV meter, ), (5) ammonia-sensitive electrode (Orion-95-10 type), (6) far-infrared elimination