Analysis of Hydrides and Other Inorganic Compounds by GC-PID,#GC_PID,#AsH4, #PH3,#H2S,#NH3

Inorganic compounds such as hydrides has low ionization potentials and can be detected by a photoionization detector (PID) at low ppb levels with GC-PID. A chromatogram of low ppb levels of AsH3 and PH3 is shown below:

The PID has detection limits in the low ppb range for many of the hydrides and other inorganic compounds. Arsenic in water has been shown to have a detection limit of 0.075 ppb in a paper "Total and Speciated Arsenic Compounds in Water by Photoionization and Gas Chromatography/PID" to be published in "Toxic Trace Metal Remobilization & Remediation - A Geochemical Body of Work" to be published by the ACS in 2012.

PID Analyzers has a broad range of products from GC Detectors (six to choose from) to Lab & Portable GC to the PeakWorks Software. These are shown below and more info is available on or website: http://www.hnu.com .

Analysis of Amines by GC -PID (9.5 eV),#GC,#GC_PID,#Amines

Amines have low ionization potentials (less than 10 eV) and can be ionized with a 9.5 eV lamp. The use of the 9.5 eV lamp improves the specificity of the photoionization detector (PID). Low ppm levels of these compounds are shown below. The detection limits should be in the ppb range depending on the packed columns since the PID has more than adequate sensitivity.

PID Analyzers has a broad range of products from GC Detectors (six to choose from) to Lab & Portable GC to the PeakWorks Software. These are shown below and more info is available on or website: http://www.hnu.com .

Rapid Analysis of Solvents by Fast GC,#GC.#GC_FID,#Solvent_Analysis,#Software

Much of the previous work on “fast GC” utilized short (5M) thin film capillary columns to elute solutes quickly and the result is rapid but inferior separations because of the short column. New technology developed at Valco’s capillary column development center where VICI takes polyimide-coated fused silica (FST) and removes the polyimide layer. Then the (FST) is electroplated with nickel. As a result of the superior heat transfer of the electroplated nickel, we are able to rapidly and efficiently heat and achieve excellent resolution for a 30M capillary column.
 These columns can be programmed faster (hundreds of degrees/min)- save 50-90%
 The columns can be reliable started a few degrees above ambient
 These columns cool down faster because of their low mass, so savings are> 50%
Several examples of C1 to C6 HC that are given below demonstrate a > 50% reduction in analysis times:The columns can be programmed faster 50-60o/min and will cool down faster as a result of their low mass.
A display of the software is shown below:

An example of a fast separation of solvents and gasoline vapor by fast GC-PID is shown below:

This column separates low boiling solvents like methanol as well as high boilers like Xylene, all with excellent peak shape.

Contact PID Analyzers for more info on “The FAST GC”
PID Analyzers, LLC 2 Washington Circle, Sandwich, MA 02563; T 1 774 413 5281
url: http://www.hnu.com

Rapid Analysis of High Molecular Weight (C18 to C30) Hydrocarbons, #GC,#Fast_GC,,#C18_to_C30_ alkanes

Much of the previous work on “fast GC” utilized short (5M) thin film capillary columns to elute solutes quickly and the result is rapid but inferior separations because of the short column. New technology developed at Valco’s capillary column development center where VICI takes polyimide-coated fused silica (FST) and removes the polyimide layer. Then the (FST) is electroplated with nickel. As a result of the superior heat transfer of the electroplated nickel, we are able to rapidly and efficiently heat and achieve excellent resolution for a 30M capillary column.
 These columns can be programmed faster (hundreds of degrees/min)- save 50-90%
 The columns can be reliable started a few degrees above ambient
 These columns cool down faster because of their low mass, so savings are> 50%
Several examples of C1 to C6 HC that are given below demonstrate a > 50% reduction in analysis times:The columns can be programmed faster 50-60o/min and will cool down faster as a result of their low mass.
A schematic of the fast GC electronics is shown below:

An example of a fast separation of C18- C30 by fast GC is shown below at rates from 80 to 800 C/min is shown below. Note that even for lower program rate, the time for analysis is only 4 min.

Contact PID Analyzers for more info on “The FAST GC”
PID Analyzers, LLC 2 Washington Circle, Sandwich, MA 02563; T 1 774 413 5281
url: http://www.hnu.com

Rapid Six Second Analysis of Gases by Fast GC_PID, #GC, #PID,#Fast_GC

Much of the previous work on “fast GC” utilized short (5M) thin film capillary columns to elute solutes quickly and the result is rapid but inferior separations because of the short column. New technology developed at Valco’s capillary column development center where VICI takes polyimide-coated fused silica (FST) and removes the polyimide layer. Then the (FST) is electroplated with nickel. As a result of the superior heat transfer of the electroplated nickel, we are able to rapidly and efficiently heat and achieve excellent resolution for a 30M capillary column.
 These columns can be programmed faster (hundreds of degrees/min)- save 50-90%
 The columns can be reliable started a few degrees above ambient
 These columns cool down faster because of their low mass, so savings are> 50%
Several examples of C1 to C6 HC that are given below demonstrate a > 50% reduction in analysis times:The columns can be programmed faster 50-60o/min and will cool down faster as a result of their low mass.
A photo of the simple fast GC fluidics for gases is shown below:

An example of a fast separation by fast GC-PID is shown below:

Contact PID Analyzers for more info on “The FAST GC”
PID Analyzers, LLC 2 Washington Circle, Sandwich, MA 02563; T 1 774 413 5281
url: http://www.hnu.com

EPA Site Program HNU GC311 #EPA_Site_Program #Photoionization #PID #GC #Gas_Chromatography

The HNU Model GC311 was evaluated by the EPA superfund Site Program.


EPA Site Program HNU GC311

Derivitizations for Improved Detection of Alcohols by Gas Chromatography and Photoionization Detection

Derivatizations for Improved Detection of Alcohols by Gas Chromatography and Photo Ionization Detection #PI...