LC-2010HT

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OptionsOptionsOptions for LC-2010HTDescription Part Number Set NoSample rack for 1mL vials (2 racks / set)Sample rack for 1.5mL vials (2 racks / set)*228-37532-91228-45409-91228-44628-91For LC-2010AHT / 2010CHT (up to 350 vials)For LC-2010AHT (up to 210 vials)For LC-2010CHT (up to 140 vials)Sample rack for 4mL vials (2 racks / set)Sample rack for Microtiter plate (2 racks / set)Sample rack for Deep-well plate (2 racks / set)Column Management Device (CMD)CMD cableOptional board228-37544-91228-37545-91228-37546-91228-37281-91228-39991228-40050-91For LC-2010AHT / 2010CHT (up to 100 vials)For LC-2010AHT / 2010CHT (up to 4 vials)For LC-2010AHT / 2010CHT (up to 4 vials)For column management (1 device for 1 column)1 cable is required for 1 LC-2010AHT / 2010CHTTo add functions of:1) BCD output of sample number2) addition of event output terminal3) analog output of pump pressure, column oven temperature,ambient temperature sensor, sample cooler temperatureRecycle valveTemperature-controlled flow cell for semi-micro HPLC2mL sample loop kitMaintenance kit without toolsMaintenance kit with tools* Sample rack for 1.5mL vials (2racks / set) is included as standard accessory.228-37383-91228-37384-91228-37548-91228-39872-96228-39872-97For solvent recyclePass length: 5mm, cell volume: 24μLFor large-volume injectionVials for AutosamplerRacksApplicable Sample VialsSample Rack for 1mL Vials11mL Glass (with PE cap)250pcs / set(228-39699-91)21.5mL Glass (with cap,silicone rubber septum)100pcs / set(228-15652-92)31mL PP*(with PE cap)200pcs /set(228-31600-91)40.2mL PP*(with PE cap)100pcs / set(228-35217-91)Sample Rack for 1.5mL Vials51.1mL Glass*(with cap, silicone rubberseptum)100pcs / set(228-21283-91)60.3mL Glass*(with metal spacer, cap, silicone rubber septum)100pcs / set (228-16847-92)(Vials without spacer as spare)100pcs / set (228-16850-91)Sample Rack for 4mL Vials74mL Glass(with cap, silicone rubberseptum)100pcs / set(228-21287-91)84mL PP*(with PE cap)100pcs / set(228-31537-91)90.3mL Glass*(with spring to be inserted in 4mL vial)100pcs / set (228-21284-91)(Vials without spring as spare)100pcs / set (228-21285-91)• All vials commonly used with the SIL-20A / 10ADVP / 10AF / 10Ai / HT can be used with the LC-2010HT.• Regarding vials, microtiter plates, and deep-well plates marked*, the set temperature and actual temperature might differ due to differences in shape or in the thermalconductivity of the materials.• Silicon rubber septa (with PTFE cover) (228-26718-93,100pcs) or PTFE septa (228-15655-91,100pcs) can be chosen for vials No. 2, 5, and 6.• Silicon rubber septa (with PTFE cover) (228-21290-91,100pcs) or PTFE septa (228-23469-91,100pcs) can be chosen for vials No. 7, 8, and 9.• Please use commercially available microtiter plates and deep-well plates.• PP: polypropylene, PE: polyethylene18
Technical BulletinEnhancing the Accurancy of Low-pressure GE systemsHPLC gradient (GE) systems are classified as high-pressure GEsystems or low-pressure GE systems, according to the unitconfiguration. This bulletin describes how to make stableconcentration settings with a low-pressure GE system, based onthe LC-2010HT.Solenoid Valve(Mobile Phase Mixing Valve) DriveTo reduce the dead volume and flow pulsations,the LC-2010HT uses a serial double-plunger pump, incorporating aprimary pump head with a 10μL plunger capacity. A low-pressure GEsystem mixes multiple mobile phases by switching the pump solenoidvalve in synchronization with the pump intake stroke. A low-capacityplunger pump that requires frequent solenoid valve switching isunfavorable for accurate concentration settings.However, the LC-2010HT eliminates this problem by allocating 100%concentration over four pump intake cycles, as shown inFig.1.Fig.1 shows the flow rate changes in the pump head and the solenoidvalve operation timing for a concentration setting of B: 37.5%,A:62.5%.Correction for Effects due to Mobile PhaseCompressibilityFig. 2 is an enlarged view of the transition from discharge tointake for the pump shown in Fig. 1. The point (1) in the diagramis where the pump plunger starts to retract from its fully advancedposition. At this point, the pump head interior still retains highpressure from the discharge stroke. The mobile phase starts toflow into the pump head after the plunger retracts and allows thecompressed mobile phase to expand back to atmosphericpressure inside the pump head ((2) in Fig. 2).The hatched area in Fig. 2 represents the area where no mobile phaseintake occurs. As this area increases in size and concentration errorsincrease at higher pressures, the solenoid valve operation timing isadjusted according to the monitored pressure values to reduce theconcentration errors. Solenoid valve operation can be matched to themobile phase compressibility by entering the compressibility value.Correction for Errors due to Dalay inSolenoid Valve ResponseA millisecond-order delay occurs before the solenoid valve operatesafter the signal is input. Consequently, the solenoid valve is operatedearly by a time corresponding to this delay.Correction of Mechanical ErrorsMechanical errors in cams and other parts of the plunger drive trainaffect the concentration accuracy. The LC-2010HT is accuratelycalibrated before dispatch from the factory for the difference betweenthe set concentration and measured values.Using the techniques above, the LC-2010HT achieves a concentrationaccuracy of ±0.5% (water/acetone mixture at 0.1 to 2.0mL / min. and 1to 20MPa).1 2Fig. 2Flow Rate in Pump HeadTimeDischargeB B A A A BIntakeValve B open (B: 37.5%)Valve B openValve A openValve A open (A: 62.5%)Fig. 119
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LC-2010HT

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