Friday, October 28, 2016

New! Hand-held PID-based GC

Our new Model PID GC 121 was introduced this month at the New England local section American Industrial Hygiene Association (NEAIHA) all-day conference and at the American Industrial Hygiene Association (AIHA) Fall Conference. 


This photoionization detector (PID) based hand-held analyzer uses a gas chromatograph (GC) to separate a variety of toxic chemicals present in the workplace at chemical manufacturing facilities, refineries, plants, emergency response situations, laboratories and all other operations that require monitoring of processes for industrial hygiene worker health and environmental safety applications.

The PID GC 121 is a highly customized analyzer. There are over 250 chemical compounds that can be detected using a PID. When coupled with a GC, this PID can deliver specific direct reading results for similar chemical compounds within the same detection range. This would eliminate the need for the common costly gas detection consumable items like detector tubes. Instead of scrubbing out other chemical compounds present in the sample, the Model 121 actually measures all of the media present and provides specific detection and identification of each chemical present in the sample. 


The Model 121 is designed for rugged field use and is simple to use and maintain with minimal training required. Real-time data is stored and collected on the unit and can be sent to an external monitoring system/PC/tablet via Bluetooth. 

Discussion about particular applications and desired species to be monitored needs to occur with one of our specialists to determine the lamp and GC capillary/packed column match. For example: the unit can be optimized for a ppb Benzene specific analysis or modified for BTEX measurements. Other typical applications include: vinyl chloride, ethylene dichloride, ethylene oxide, hydrazine, acrylonitrile, arsine, phosphine, hydrogen sulfide and so many more! 

Inquire today about how you can add the Model 121 to your gas detection tool-kit. Contact Jack Driscoll or Jennifer Maclachlan for more information at sales@hnu.comsales@hnu.com or via phone at 774-413-5281 X0. 

Thursday, October 13, 2016

Join us in San Antonio for the AIHA Fall Conference on Leadership & Management





In about a week we’ll be headed to San Antonio and we hope you'll join us! If you can't travel to the meeting but still want to participate, check out how to register for the virtual conference here.

We’re proud to participate as a Silver Conference Partner for the American Industrial Hygiene Association (AIHA) AIHA’s Fall Conference on Leadership and Management.

With dynamic education sessions organized by tracks, an excellent line-up of speakers and coordinated events to facilitate networking, AIHA’s Fall Conference is the best setting for IH/OEHS professionals to collaborate and learn.


AIHA Fall Conference 2015, Orlando, FL
Make sure you visit us at the center of it all, the Hub! We’ll be there to showcase the new additions to our HNU portable gas detection product line which includes the Model 121 hand-held gas chromatograph, the Model 115 and the latest HNU PID's (with sensors, ppb readings etc). Plus, you can enjoy some refreshments, swap ideas with your colleagues, and boost your creativity with interactive games. 

The Hub is also where you can mix and mingle with us and your new friends at the Networking Welcome Reception on Monday evening. 

Check out the full schedule of events located at the Hub

We look forward to connecting with the best and brightest of IH/OEHS profession in San Antonio; we hope you’ll be one of them!

-Jennifer Maclachlan, HNU-PID Analyzers, LLC, @pidgirl







Wednesday, October 12, 2016

Cape Cod Forensic Science Cafe at Cape Cod Celebrates National Chemistry Week 2016

Join us for our fourth annual Cape Cod Celebrates National Chemistry Week at the Cape & Islands Boy Scouts Camp Greenough’s Wicked Cool Autumn Welcome featuring the Cape Cod Forensic Science Cafe: A hands-on experience led by local area businesses, educators and members of the Northeastern Local Section of the American Chemical Society. This event is open to the public. Barnstable County Sheriff’s office will show fingerprinting techniques used by the county to solve crimes, Cambridge Science Festival’s Science on the Street and Palladium Science Academy of NY will utilize the forensic theme in their hands-on activities. Stay tuned to the Cape Cod Science Cafe blog for more featured activities. Participants who complete all science cafe activities will earn a Wicked Cool Science Cafe badge for their efforts. Contact me if you would like to volunteer at this event or learn about volunteer opportunities at other public outreach education events in the Boston area. 

Monitoring Benzene at ppt Levels at Fencelines of Chemical Plants or Refineries

Accepted for presentation at Pittcon 2017 


Sunday March 5, 2017
McCormick Place, Chicago, IL
ACS Division of Analytical Chemistry Poster Session
Slot #38


Authors: J.L. Maclachlan and J.N Driscoll, PID Analyzers, LLC

Title: Monitoring Benzene at ppt Levels at Fencelines of Chemical Plants or Refineries


Exposures in the area surrounding a manufacturing or chemical plant are regulated by the EPA Clean Air Act of 1990 and subsequent amendments. Since that time, more than 120 regulations have been issued. In Oct. 2015, the EPA issued a new limit of 2.8 ppb of benzene for fence lines at refineries. Fence line monitoring is important since fugitive emission sources account for most of the VOC inventory according to EPA.


Gas chromatography is one of the detection methods mentioned by EPA. The detector described by EPA is the flame ionization detector (FID). Since the FID does not detect  low ppb levels of benzene, a thermal desorber is required. The photoionization detector (PID) is 50-100 times more sensitive than the FID and does not require any support gases like H2 or zero air. The PID can detect < 1 ppb of benzene by direct injection. We have also developed a low power concentrator that can provide a 100 fold concentration of an air sample that can be desorbed in < 3 seconds. We have developed a capillary column that can separate and detect benzene specifically in under 2 minutes in the presence of 50 fold excess of other refinery hydrocarbons.  

The GC/PID will be compared with the GC/FID method for precision and accuracy of low and sub ppb levels of benzene and other VOC’s in refinery atmospheres.

Tuesday, October 11, 2016

Detection of Toxic Chemicals in the Workplace by GC/PID

Accepted for presentation at Pittcon 2017 in the
Symposium: Environmental Analysis for Air Quality and Atmospheric Conditions 


Wednesday March 8, 2017
8:30am
McCormick Place, Chicago, IL
Authors: J.L. Maclachlan and J.N. Driscoll

Title: Detection of Toxic Chemicals in the Workplace by GC/PID


The current National Institute of Occupational Safety & Health (NIOSH) definition for an Immediately Dangerous to Life or Health (IDLH) condition, is one that poses a threat of exposure to airborne contaminants when that exposure is likely to cause death or immediate or delayed permanent adverse health effects or prevent escape from such an environment [NIOSH 2004]. There are nearly 400 hundred compounds listed by NIOSH as IDLH. Some of the most toxic chemicals are Br2, Cl2, acrolein, AsH3, chloro picrin, methyl isocyanate… In 1990, EPA published a list of 189 air toxics which are hazardous air pollutants known to cause or suspected of causing cancer. There are more than 250 chemicals regulated by the Occupational Safety and Health Administration (OSHA) that have permissible exposure limits (PEL’s) between 1 ppb and 2 ppm.  

There is a definite need for real time portable analyzers that can detect toxic chemicals with ppb or even ppt detection limits. A compact portable GC with a photoionization detector (PID) has low ppb detection limits for many of these compounds and with an efficient low power thermal desorber can detect ppt levels for many of these toxics. A battery operated GC could also be used to protect first responders in areas where there have been spills of hazardous chemicals. Presently, a gas chromatograph/ mass spectrometer (GC/MS) located in a trailer is used at a number of spill sites although it is not an ideal solution.


We will develop and describe the columns and conditions for a GC/PID for 12 toxic compounds on the OSHA toxic chemicals list or the NIOSH IDLH list.