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Volatile Organic Compounds in Water
Volatile Organic Compound (VOC) Testing & Analysis in Water
Consumables workflow ordering guide for VOCs
Regulatory agencies set threshold limits for volatile organic compounds based on threat, toxicity, and target matrix. The allowable concentration of VOCs in drinking water varies by country and region but are typically in the low mg/L (ppb) range. Due to the large number of potential contaminants, and the need to measure them at such low levels, GC/MS systems are commonly used because they provide both the sensitivity and selectivity required to identify and quantify VOCs. Additionally, recent concerns with the price and availability of helium have led laboratories to look for alternative carrier gases.
Agilent provides a complete range of products to labs using regulated methods for the analysis of VOCs in water including sample prep (Headspace, Purge and Trap, and solid-phase microextraction), analysis (GC/MSD systems, GC columns, ultra inert GC supplies, HydroInert sourcing) and reporting (OpenLab and MassHunter Unknowns Analysis Software).
For a complete guide of a rapid seven-minute analysis of 80 VOCs in drinking water with headspace GC/MSD using Hydrogen carrier gas, download the .pdf below.
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Easy selection and ordering information for determination of VOCs in water samples.
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Sample Introduction
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Static Headspace using Agilent 7697A, 8697 and 8697-XL Headspace Samplers – static headspace (HS) extraction is a direct approach as the instrument itself heats the vial to shift diffusion of VOCs into sample headspace. Regulatory Methods: ISO 20595: 2018 and HJ 810-2016. (Reference: 5994-6074)
HS-SPME - solid phase microextraction facilitates the extraction of volatile aromatic compounds in the absence of solvent. Regulatory method: ISO17943:2016. (reference: 5994-1045EN)
Description P/N View MyList for Static Headspace Supplies Vial, crimp top, headspace, clear, certified, flat bottom, 10 mL, 23 x 46 mm, 100/pk 5182-0838 Vial, headspace, certified, crimp, clear, flat bottom, 20 mL, 100/pk 5182-0837 Vial, crimp top, headspace, amber, graduation marks and write-on spot, flat bottom, certified, 10 mL, 23 x 46 mm, 100/pk 5190-2287 Vial, crimp top, headspace, amber, flat bottom, certified, 20 mL, 23 x 75 mm, 100/pk 5067-0226 Cap, crimp, headspace, aluminum, PTFE/silicone septa, 20 mm, 100/pk 5183-4477 Vial, screw top, headspace, clear, 20 mL, 23 x 75 mm, 100/pk 5188-2753 Caps/septa, screw, headspace, 18 mm, silver, magnetic, PTFE/silicone septa, 100/pk 8010-0139 View MyList for Headspace syringes for CTC/CombiPAL Syringe for CTC headspace, HD-type, 1.0 ml, PTFE-tip plunger, 23/56/side hole G6500-80107 Syringe for CTC headspace, HD-type, 2.5 ml, PTFE-tip plunger, 23/56/side hole G6500-80109 Syringe for CTC headspace, HD-type, 5.0 mL, PTFE-tip plunger, 23/56/side hole G6500-80111 View MyList for HS-SPME suppies SPME Fibers SPME Fiber DVB/C-WR/PDMS 80/10-P1, dark gray, 3/pk 5191-5874 SPME Fiber Carbon WR-95/PDMS/10-P3, dark blue, 3/pk 5191-5875 SPME Arrows DVB/Carbon WR/PDMS Arrow, 1.10 mm, 120 μm, dark gray, 3/pk 5191-5861 DVB/Carbon WR/PDMS Arrow, 1.50 mm, 120 μm, dark gray, 3/pk 5191-5864 Carbon WR/PDMS Arrow, 1.10 mm, 120 μm, light blue, 3/pk 5191-5859 Carbon WR/PDMS Arrow, 1.50 mm, 120 μm, light blue, 3/pk 5191-5863 SPME Accessories Manual Injection Kit for SPME fiber and SPME Arrow 5191-5877 Merlin Microseal SPME replacement Microseal, 23 guage (only compatible with SPME fibers) 392609902 Dynamic Headspace Purge and Trap - widely used with GC/MS for extracting trace levels of VOCs. For key instructions for success in analyzing VOCs using P&T and method details for the analysis of 71 compounds in 15 minutes, see application note 5991-0029EN. Regulatory Methods: EPA Method 524.2, 624.1 and 8260C, ISO 15680: 2003, HJ 639-201
Description P/N View MyList for Purge and Trap supplies Headspace Syringe, 27 mL, with side port, for Atomx Automated VOC Sample Prep System 5190-2234 Vial kit, 40 mL, precleaned vials, caps, and septa, for Archon purge and trap. 72/pk 5183-4741 Traps Trap, Vocarb 3000, U-shape for Teledyne Tekmar purge and trap, 1/pk 5188-8820 Trap, proprietary (#9), 12 x 1/8 inch, U-shape 5188-8816 Trap, Tenax (#1A), U-shape 5188-1447 Spargers* Sparge vessel 15 mL, amber, for internal standards, for Atomx or Aquatek 100 ALS 5190-2233 Glass, frit sparger, 5 mL, 1/2-inch 5182-0852 Glass, frit sparger, 25 mL, 1/2-inch 5182-0851 Glass, fritless sparger, 5 mL, 1/2-inch 5182-0850 Glass, fritless sparger, 25 mL, 1/2-inch 5182-0849 Needle, sparger glass, 5 mL, 1/2-inch 5182-0848 Needle, sparger glass, 25 mL, 1/2-inch 5182-0847 Sparger Kits* Frit sparger kit with fittings, 5 mL, 1/2-inch. For use with Tekmar 3000 & 3100. (Lumin/Stratum) 5182-0846 Frit sparger kit with fittings, 25 mL, 1/2-inch (Lumin/Stratum) 5182-0845 Frit sparger glassware kit, 25 mL, for Atomx 5190-2232 Fritless sparger kit, with fittings, 25 mL, 1/2-inch (Lumin/Stratum) 5182-0796 Fritless sparger glassware kit, 25 mL, for Atomx 5190-2231 *Sparger glassware is interchangeable between all Tekmar P&T concentrators. Sparger kits come with drain line, nuts, and ferrules.
Atomx and Atomx XYZ sparger kits are interchangeable. Stratum and Lumin sparger kits are interchangeable.
Additional Supplies for Teledyne/Tekmar Purge and Trap Concentrators
Description P/N View MyList for Standards Drinking water VOA standard, EPA 524.2 (73 compounds) DWM-525-1 VOC gas standard (6 compounds) DWM-544-1 Internal standard (3 compounds) STM-320N-1
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Analysis
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The DB-624 column is the global reference standard for VOC analysis. It is often the column of choice when relying on copying existing VOC methodology. Excellent peak shapes and high levels of inertness are the forté of the DB-624UI. It is the column of choice for all VOC methods and for upgrading applications for improved ease of quantification and lower detection limits. For higher productivity and throughput, the 0.18 mm version provides a fast and comprehensive VOC analysis in less than 15 minutes (ideally combined with 6 mm MS drawout plate when using He carrier gas). For optimized chromatographic conditions separating 80 VOCs in seven minutes using the 0.18mm column and H2 carrier gas with the Hydroinert source and 9mm drawout plate, see App note 5994-4963EN.
The DB-VRX column is especially targeted for non-MS VOC methods. For VOC applications that contain the six early eluting “gases”, the DB-VRX offers a unique separation that avoids sub-ambient initial oven temperatures.Description P/N View MyList for J&W GC Columns J&W DB-624 Ultra Inert GC Column, 20 m, 0.18 mm, 1.00 µm, 7 inch cage (recommended for H2 carrier gas) 121-1324UI J&W DB-624 Ultra Inert GC Column, 30 m, 0.25 mm, 1.40 μm, 7 inch cage 122-1334UI J&W DB-624 Ultra Inert GC Column, 60 m, 0.25 mm, 1.40 μm, 7 inch cage 122-1364UI J&W DB-VRX GC Column, 20 m, 0.18 mm, 1.00 µm, 7 inch cage 121-1524 J&W DB-VRX GC Column, 30 m, 0.25 mm, 1.40 µm, 7 inch cage 122-1534 J&W DB-VRX GC Column, 60 m, 0.25 mm, 1.40 µm, 7 inch cage 122-1564 Description P/N View MyList for GC/MSD Supplies GC Inlet parts Ferrule, 0.4 mm id, 15% graphite/85%Vespel, 0.1 to 0.25 mm column, 10/pk 5181-3323 Inlet liner, Ultra Inert, splitless, straight, 1 mm id (recommended for both He and H2 carrier gas) 5190-4047 inlet liner, Ultra Inert, splitless, straight, 2 mm id, for use with HS Transferline (recommended with SPME arrows) 5190-6168 Inlet liner, Ultra Inert, splitless, straight, 0.75 mm id (recommended with SPME fibers) 5190-4048 Inlet septa, bleed and temperature optimized (BTO), non-stick, 11 mm, 50/pk 5183-4757 GC inlet seal, gold plated, with washer, Ultra Inert 5190-6144 GC inlet seal, gold plated, with washer, Ultra Inert, 10/pk 5190-6145 GC columns connection parts Column nut, collared, self-tightening, inlet/detector G3440-81011 Column nut, collared, self-tightening, MSD G3440-81013 Pneumatic parts Sample loop, headspace, 1.00 mL, inert G4556-80106 Sample probe, deactivated, for Agilent 7697A headspace sampler G4556-63825 Transfer line connection supplies Fused silica tubing, deactivated, 5 m, 0.32 mm, 0.43 mm od 160-2325-5 Ferrule, polyamide, graphite 1/32 inch, 5/pk 0100-2595 Fitting, internal reducer, 1/16 to 1/32 inch 0100-2594 MSD source parts Filament, high temperature, EI ion source G7005-60061 Drawout plate, 6 mm, inert G2589-20045 Drawout plate, 9.0 mm, inert, Inconel G3440-20022 9mm Hydroinert extraction lens* (recommended for H2 carrier gas) G7078-20909 Extraction lens insulator (recommended for H2 carrier gas) G3870-20445 Gas Filters Gas Clean Carrier gas kit, 1-position, for 7890, 1/8 in. Includes one 1-position 1/8 in connecting unit; Purifiers: one carrier gas (p/n CP17973); one 7890 mounting bracket CP17988 Gas Clean kit, for 8890 and 8860 GC. Includes mounting bracket, connecting unit, and carrier gas filter CP179880 Gas Clean carrier gas purifier replacement cartridge CP17973 Agilent big universal trap (recommended for H2 carrier gas) RMSH-2-SS Agilent Gas Clean purifier kit for carrier gas CP17976 Description P/N View MyList for Hydroinert Source for transition to H2 carrier gas Hydroinert complete source assembly for 5977 G7078-67930 Hydroinert complete source assembly for 7000 TQ G7006-67930 Hydroinert GC/MSD upgade 5505-0083 Hydroinert GC/TQ upgade 5505-0084 Stainless steel installation kit 19199S *Default lens included with the Hydroinert source
Resources for VOC Analysis in Environmental Samples
Solutions for VOC Testing in Water
Typically, VOCs are industrial solvents, fuel oxygenates, or byproducts of chlorination in water treatment often found as groundwater contaminants. Agilent GC/MS systems and headspace analyzers help meet the requirements of regulated methods such as EPA 8260, 524, and 624.
Solutions for VOC Testing in Soil
VOCs found in industrial waste are organic contaminants in soil and sediment through which wastewater flows. Because VOCs have adverse environmental effects and soil remediation is costly, accurate measurement is needed to determine the significance of contamination and cleanup.
Solutions to Protect the Environment with Assured Analysis
Monitoring contaminants in air, water, and soil, and expanding understanding of how chemicals can affect human and animal health, is crucial and yet often highly challenging. As environmental contaminants become subject to increasing and stricter regulation such as US EPA methods, there is also a growing need for analytical solutions that consistently produce high-quality data.
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