Background technology
Chromatographic column is the core of gas chromatograph, and major function is to finish chromatographic sample to separate, and the temperature of the chromatography column of paramount importance index index that is gas chromatograph, its stability, repeatability is to chromatographic resolution, qualitative, quantitatively most important.Chromatographic column will realize being an important techniques link to the quick lifting/lowering temperature of its pillar in the course of the work.At present, to the chromatographic column type of heating, traditional mode is for to be positioned over chromatographic column in the post case, and direct then heated beam case utilizes fan to make its heat carry out convection current, thereby reaches thermal equilibrium; This type of heating, the long-pending design of post casing is big, and power consumption own is big, can't realize quick lifting/lowering temperature, and is not suitable for the application of portable chromatograph; Comparatively Xian Dai design has: design heating skeleton in the post casing, kapillary is wrapped on the skeleton, by the heating arrangement on the skeleton wall kapillary is heated then, this type of heating heating is inhomogeneous, efficient is lower, can't satisfy the demand for development of the quick separation detection of modern analytical technique.
Summary of the invention
The purpose of this invention is to provide heating arrangement on a kind of high efficiency low energy consumption capillary chromatographic column post that can be portable.
Technical scheme of the present invention is, heating arrangement on a kind of capillary chromatographic column post, comprise flexible heating insulation sleeve, capillary chromatographic column and chromatographic column calandria three parts, described capillary chromatographic column is nested in the chromatographic column calandria, the chromatographic column calandria is nested in the flexible heating insulation sleeve, described capillary chromatographic column is fixed, be connected between six-way valve and the detecting device by screw extruded anisotropic graphite cutting ferrule, the chromatographic column calandria directly inserts in the jointing of two ends by easy structure, and by insulation in the post case, heat-resisting support is fixed, described jointing design has the heating electrode terminal, it is directly heated chromatographic column, described heating electrode terminal by the connector fixed leg be connected pad and be fixed in the post case, be provided with accurate thermal resistance in the post case.
Described chromatographic column is a capillary column, adopts quartzy material.
Heating arrangement is meant that capillary chromatographic column is nested in the chromatographic column calandria on the described capillary chromatographic column post, and the chromatographic column calandria is nested in the flexible electrical heating insulation sleeve.
Described chromatographic column calandria adopts stainless steel or copper material.
Described insulation, heat-resisting support adopt the mica material.
Described chromatographic column calandria is cylindrical, and the internal physical size diameter is that φ 0.4mm-φ 1.6mm, wall thickness are that 0.1mm-1mm, length overall are 1m-65m.
Heat on the described capillary chromatographic column post, be meant by the chromatographic column calandria and directly capillary chromatographic column heated.
Described flexible heating insulation sleeve adopts glass fiber material as insulator.
Described flexible heating insulation sleeve is cylindrical, and the internal physical size diameter is that φ 0.6mm-φ 3mm, wall thickness are that 0.1mm-0.5mm, length overall are 1m-65m.
Each parts of heating arrangement adopt stainless steel, teflon, brass, pottery, quartz, graphite, mica, glass fiber material on the described capillary chromatographic column post.
Described thermode terminal pushes mutually with jointing by the connection pad and compresses, and draws the heating electrode line.
Be provided with fan in the described post case, be used for fast cooling.
Be provided with accurate thermal resistance in the described post case, adopt the platinum resistor temperature measuring element, be used for temperature real-time measurement chromatographic column.
The invention has the beneficial effects as follows, broken the deficiency of heating technique on the existing chromatographic column post, a kind of microminiaturization is provided, modularization, quick lifting/lowering temperature, low-power consumption, low cost, high efficiency on-column heating device of chromatographic column, make the chromatographic column thermally equivalent, guarantee the compartment analysis usefulness that it is good, the futures analysis instrument, heating system design on the particularly modern miniature analytical instrument post has very far-reaching reference reference significance.
Embodiment
As shown in Figure 1, the invention provides heating arrangement on a kind of capillary chromatographic column post, capillary chromatographic column 3 is nested in the chromatographic column calandria 4, described chromatographic column calandria 4 adopts stainless steel, profile is cylindrical, the internal physical size diameter is φ 0.8mm, wall thickness is 0.2mm, length overall is 15m, chromatographic column calandria 4 is nested in the flexible heating insulation sleeve 5, described flexible heating insulation sleeve 5 adopts the glass fibre material, the internal physical size diameter is φ 1.2mm, wall thickness is 0.1mm, length overall is 15m, capillary chromatographic column 3 is fixed and is connected between six-way valve 1 and the detecting device 11 by screw 13 extruded anisotropic graphite cutting ferrules 14, chromatographic column calandria 4 directly inserts in the jointing 12 by easy structure, and by insulation in the post case 7, heat-resisting support 2 is fixed, described insulation, heat-resisting support 2 adopts the mica material, the design of described jointing 12 two ends has heating electrode terminal 15, it is directly heated chromatographic column, described heating electrode terminal 15 is by connector fixed leg 10, jointing 12 be connected pad 9 and be fixed in post case 7, be provided with accurate thermal resistance 8 in the described post case 7, can be to the temperature real-time measurement of chromatographic column, and accurately control, fast cooling fan 6 is set in the post case 7, be used for the chromatographic column fast cooling, thereby improved stratographic analysis efficient.
Each parts of heating arrangement adopt stainless steel, teflon, brass, pottery, quartz, graphite, glass fiber material on the described capillary chromatographic column post.