了解色谱注射器术语

我们大多数人都使用注射器将样品引入色谱仪多次，而不必理解其术语和规格。此类功能指定其组件零件，并有助于为所需的应用做出正确的选择。

让我们熟悉色谱中使用的注射器的命名法和规格

终止

终止refer to the interface between the syringe barrel and its needle connection. The common terminations are described here:

胶结针（N）或固定针（F）

将针胶结成与零毕业标记一致的点，将针胶结成玻璃注射器桶中。这样的注射器不能被高压灭菌。

Removable needle (RN)

The needle is removable to permit precise seating at the zero graduation mark. User has option to choose the needle gauge, length and point style. The syringe can be autoclaved upon dismantling.

摇滚轮毂（KH）

用于高达6000 psi的高注射压力。提供了将垫片包含在可重复的深度注射中。拆卸时可自压。

PTFE LUER TIP（LT）

Needles are removable and fit over a ground glass hub which is tapered in the shape of a male luer. It is used to lock in place luer hub needles and connections. The syringe is autoclavable when disassembled.

Luer Tip Cemented Needle (LTN)

针头将针头固定在对应于零毕业标记的点的玻璃注射器桶中。死量仅限于针的内部体积。这样的注射器不可自压。

PTFE Luer Lock

终止有一个PTFE雄性luer尖端，带有镍板的黄铜锁定枢纽，该轮毂接受并锁定成金属针和通用连接器。拆卸时可自压

样品锁（SL）

样品锁与RN合并到/关阀。针。终止用于顶空分析，环境样品收集和存储，GC样品的预纯化GC analysis. Not autoclavable.

点样式

Point style selection helps in particular application.

Points style 2 :锋利的斜角针，以最佳的隔膜穿透和最小的隔膜振动

Point style 3 :blunt needle point for HPLC injection valves and for sample pipetting

Point style 5 :hole/bevel needle with side hole. Liquid samples are filled and dispensed through the side hole. Less coring damage of septa

点样式AAS：特殊的圆锥针子，用于自动采样器注射器。

Optimum use of point styles in different applications

GC注射 -点风格AAS延长了SEPTA的使用寿命。另外，点样式2也常用。

HPLCinjections-22量规，点样式3针通常使用

针量表

Different size gauges are available for syringe needles ranging from 22 to 26 and 22S to 26S. Small s specifies a small internal volume of the needle. Needles with small s have thicker sidewalls which is a useful feature when using the syringe in the autosampler

测量	o.d (mm)	i.d (mm)
22	0.72	0.41
22s	0.72	0.15
23	0.64	0.34
23s	0.64	0.15
25	0.51	0.26
26	0.46	0.26
26s	0.47	0.13

The next article will provide useful tips on proper use, handling and care of syringes for long time usage and accuracy of results