多规格通量可选:根据实验室样品量需求,氮吹仪分为12孔、24孔、48孔、96孔等多种规格,常规实验室可选用24孔型号,高通量实验室(如第三方检测机构、大型药企)可选用48孔、96孔型号,一次可批量处理多支样品管,无需反复操作,大幅提升工作效率。
独立可控,互不干扰:每一个样品孔都配备独立的氮气流量调节阀和可调节高度的吹扫针,可根据不同样品的体积、溶剂特性,单独调节吹扫流量和针距,避免因样品差异导致的浓缩效果不均,实现多样品并行处理的同时,保证每一个样品的浓缩质量。
适配自动化操作:高端全自动氮吹仪可实现自动升降吹扫针、自动调节氮气流量、定时控制浓缩终点,无需人工值守,进一步提升并行处理的效率,尤其适合大批量样品连续处理,减少人工操作误差,保障实验重复性。
(三)惰性保护:防氧化、防降解,保障样品纯度与回收率
氮气纯度要求:需搭配≥99.99%的高纯氮气,氮气经稳压稳流处理后,均匀吹扫至样品液面,形成一层惰性气体保护层,彻底隔绝氧气,防止样品中的易氧化组分(如多酚类物质、维生素、某些药物杂质、环境中的持久性有机物)被氧化,避免目标物结构破坏、含量降低。
全程惰性环境:从浓缩开始到结束,氮气持续吹扫,确保样品在整个浓缩过程中都处于惰性氛围中,不仅能防止氧化,还能减少空气中的杂质(如灰尘、水汽)污染样品,保障样品纯度,为后续的GC、HPLC、MS等仪器检测提供准确的样品基础。
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