Abel Industries

AB GC Column Performance
Polyethylene Glycol (PEG)
Fused Silica Tubing

AB-PLOT Columns

Abel offers three types of PLOT columns, AB-PLOT Al2O3, AB-PLOT Molesieve, and AB-PLOT Q for various applications in petrochemical, environment, and pharmaceutical industries.

• Porous Layer Open Tubular (PLOT) formed by various particle absorbents
• Truly immobilized particle coating onto capillary tubing wall, no need of using trap column
• Very high specific surface areas to provide high capacities needed for separations
• Different “Polarities”( column s electivity) to t ail s pecific se parations
• Ideal columns for separating volatile and gaseous compounds
• Replacement of packed columns

How to Ch oose an AB-P LOT Column


Common Practices of Using PLOT Columns:
• Avoid using a column at over temperature limit, as it changes column selectivity
• Avoid direct aqueous sample introduction to Alumina, Molesieve PLOT columns
• Avoid direct dirty sample introduction to PLOT columns, as performance regeneration takes long time. Use backflushing as much as possible
• Avoid rinsing a colum n to regenera te the column perform ance. Ins tead, using tempe rature con dition a columnas much as possible
• Seal column ends with new septum when it is stored outside a GC oven
• Cut a colum n gently and neatly to avoid partic le dislodging
• Do not tap or vibrate a column, avoid too much tubing bending, as these wi ll destroy coating binding and generate particulates to cause detector blockage or baseline spike
• Use helium as carrier gas if possible. When hydrogen gas is used as carrier gas, avoid too m uch h igh temperature instrumentation
• Keep a colum n at 100-150℃ whe n idlin g insid e a G C oven, mainta in colum n ga s flow • For a GC equipped with EPC, use slow pressure ramping for constant flow mode. Avoid pressure pulse injection

• A PLOT column can be very fragile as it isp repared u nder g reat stresses. Use i t with g reat ca re.
• A PLOT column can be used in a GC-MS with great care to avoid particle dislodging. In case the particle invade into the ion source, clean the ion source as soon as possible to avoid particle moving into detector or turbo pump
• Use a shorte r lengt h colum n first. Use a 50/60m column if retention needs to be increased
• Use a 0.53m m I D column fo r larg e samp le loadin g capacit y. Us e a 0.32 mm ID c olumn for improv ing base line separations or GC-MS applications
• Elution order of working compounds has not been known completely. Try common sense, your own knowledge, literature, expert consultation, and other resources to identify peaks. Use internal standards or GC-MS as aid for peak identification
• There is no totally “inert”P LOT column. Quantify your analysis r esult with care.Calibrate the result time by time as a column performance may be decreased over time
• Bare spots over column length are normal for PLOT columns. It does NOT affect column efficiency, retention time and coating immobilization


• Least “polar”a luminum o xide ph ase
• Deactivated with KCl
• Minimum surface adsorption of dienes and halocarbons
• ASTM recommended phase ·Preferred choices of hydrocarbon separation

Similar phase : HP-PLOT Al2O3/KCl,GS-Alumina/KCl,CP-Al2O3/KCl PLO


• Good selective Olefins (mid“polar”) aluminum oxide phase
• Deactivated with Na2SO4 salt
• Excellent baseline separation of C1 to C10 hydrocarbons, excellent of C2 C 5 isome r baselin e separations
• Less accurate quantitations of dienes and halocarbons
• ASTM recommended phase
• Preferred choice s o f hydrocarbo n separation

Similar phase : HP-PLOT Al2O3/”S”, GS-Alumina, CP-Al2O3/Na2SO4 PLOT, R T-Alumin


• Strong selective Olefins (most“polar”) aluminum oxide phase
• Deactivated with Na2MoO4 salt
• Mostly baseline separation of C1 to C10 hydrocarbons, good baseline separation of cyclopropane from propylene
• Accurate quantitations of dienes and halocarbons
• ASTM recommended phase
• Preferred choices of hydrocarbon separation

Similar phase : HP-PLOT Al2O3/”M” , GS-Alumina

AB-PLOT MoleSieve

• Molecular Sieve, Zeolite, 5A
• Thin and thick coatings for push limit separations, e.g. Ar/O2 separation at 35, O2/N2 with 15seconds
• Truly immobilized coating and smooth baseline workable for valve switching
• Preferred columns to analyze fixed gases from hydrocarbon streams
• Regeneration of performance from water/CO2 adsorptions at 250 for 3hours
• ASTM recommended phase
• Noble gas, air from methane, fuel cell and etc.
• Often used with other PLOT columns for fixed gas separation from sample matri

Similar phase : HP-PLOT Molesieve , CP-PLOT MolSieve


• Divinylbenzene polymer particle, nonpolar, close to traditional PoraPak Q
• Truly immobilized coating and smoothbaseline workable for valve switching and liquid sample introductionat low temperatures
• Excellent separation of C1 to C3 isomers, good separations of C3 to C12, halocarbons
• Excellent inertness and stability of water/alcohol sample, a good secondary choice of wax column for alcohol analysis
• Excellent tolerance to strong acid/base sample without affecting retention time
• Good anti-oxidation at 280℃ and fast regenerationof performance
• Good choices for analyzing low level solvent residues from wide samples, such as headspace, aqueous, or organic solutions
• Preferred columns forresidue analysis inpetroleum industry, pharmaceutical, environmental, chemical weapon

Similar phase : HP-PLOT Q, GS-Q, CP-PoraPLOT Q HT, Supel PLOT Q, Rt-Q

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