Solvent Desorption Tubes

LpDNPH Products
ORBO™ Tubes, Coated Filters, PUF Cartridges
Custom Tubes

LpDNPH Products (ordering information)

LpDNPH cartridges are air-sampling devices designated for sampling carbonyls (e.g. formaldehyde) in ambient, indoor, and industrial atmospheres. Carbonyls are trapped on a high purity silica adsorbent coated with 2,4-dinitrophenylhydrazine,where they are converted to hydrazone derivatives. The derivatives are eluted from the cartridge with acetonitrile and analyzed by HPLC.

Features & Benefits of LpDNPH cartridges:

High purity adsorbent for better accuracy and trace analysis.
High sensitivity, low background.
Low pressure drop, enables use at high sampling rates (1.5-2 L/min)
New packaging, for maximum sample integrity
Manufactured in controlled environment
Meet EPA, OSHA, NIOSH and ASTM specifications

LpDNPH Cartridge Specifications
Adsorbent:	Chromatographic grade, high purity silica gel coated with: DNPH: 2,4-dinitrophenylhydrazine BPE: trans-1,2-bis(4-pyridyl)ethylene
Particle Size:	150-250µm (60/100 mesh)
DNPH Loading:	0.29% (1mg/cartridge) 0.86% (3mg/cartridge, H series) 0.21% (0.25mg/cartridge, ORBO™-DNPH)
Bed Weight:	350mg (S10 series) 350mg (H10) 120mg (ORBO™-DNPH) 1g (H30) 10g (H300)
Capacity (total carbonyls):	75µg (S10 series) 225µg (H10) 643µg (H30) 6400µg (H300) 18.8µg (ORBO™-DNPH)
Cartridge Length:	7.4cm (S10) 3.8cm (S10x) 4.0cm (S10L) 4.0cm (Rezorian™) 9.0cm (ORBO™-DNPH)
Background:	SPE Style Cartridges <0.06µg formaldehyde <0.10µg acetaldehyde <0.30µg acetone	ORBO™-DNPH <0.025µg formaldehyde <0.035µg acetaldehyde <0.120µg acetone
Pressure Drop:	<7pKa at 1.5L/min <20 inches water at 167mL/min (<28 inches water/<2.1 inches mercury)

Agency Method Applications
	US EPA TO-11A-Method for Determination of Formaldehyde in Ambient Air Using Adsorbent Cartridge Followed by High Performance Liquid Chromatography (HPLC)
	US EPA IP-6A-Determination of Formaldehyde and Other Aldehydes in Indoor Air Using a Solid Sorbent Cartridge
	US EPA-Technical Assistance Document for Sampling and Analysis of Ozone Precursors
	ASTM D5197-Standard Test Method for Determination of Formaldehyde and Other Carbonyl Compounds in Air (Active Sampler Methodology

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