The VOCs Combined Sampling Tube (Stainless Steel with Copper Cap, ¼” × 3½”) is a precision-engineered thermal desorption sorbent tube designed for the reliable collection and analysis of volatile organic compounds (VOCs) in air and gas samples. Manufactured from high-grade stainless steel and sealed with durable brass/copper storage caps, this industry-standard sampling tube delivers exceptional performance in environmental monitoring, industrial hygiene, and indoor air quality testing applications.
VOCs Combined Sampling Tube Stainless Steel with Copper Cap ¼” × 3½”
Description
The VOCs Combined Sampling Tube (Stainless Steel with Copper Cap, ¼” × 3½”) is a precision-engineered thermal desorption sorbent tube designed for the reliable collection and analysis of volatile organic compounds (VOCs) in air and gas samples. Manufactured from high-grade stainless steel and sealed with durable brass/copper storage caps, this industry-standard sampling tube delivers exceptional performance in environmental monitoring, industrial hygiene, and indoor air quality testing applications.
This ¼-inch outer diameter × 3½-inch length (6.35 mm × 89 mm) tube conforms to the internationally recognized “industry standard” format, ensuring seamless compatibility with leading thermal desorption systems including PerkinElmer, Markes International, Dani, Shimadzu, and major domestic thermal desorbers. Available in multiple sorbent configurations—including single-bed, dual-bed, and triple-bed combinations—our VOCs sampling tubes are engineered to meet the rigorous demands of regulatory methods such as HJ734-2014, EPA TO-17, and EN ISO 16017.

VOCs Combined Sampling Tube Key Specifications
| Parameter | Specification |
| Product Name | VOCs Combined Sampling Tube / VOCs Adsorption Tube |
| Material | 304 Stainless Steel |
| Outer Diameter | ¼ inch (6.35 mm) |
| Length | 3½ inches (89 mm) |
| Surface Roughness | Ra ≤ 0.4 μm (available upon specification) |
| Sealing/Cap Type | Brass/Copper Storage Caps (optional PTFE caps also available) |
| Packaging | 10, 12 tubes per box |
| Conditioning | Pre-conditioned / pre-aged options available |

Our VOCs combined sampling tubes are available in multiple sorbent bed configurations to accommodate different VOC target compound ranges and regulatory methods:
Tenax TA (200 mg): 2,6-diphenyl-p-phenylene oxide porous polymer; ideal for medium to high-boiling VOCs, benzene, and TVOC detection
Tenax GR: Tenax/graphite composite; extended range to lower-boiling compounds
Activated Carbon: Coconut shell activated carbon for broad-spectrum VOC capture
Combination 1: Tenax GR (30 mm) + Carbopack B (25 mm) – suitable for a wide range of VOCs including aromatic hydrocarbons
Combination 2: Carbopack B (30 mm) + Carboxen 1000 (10 mm) – optimized for both volatile and semi-volatile compounds
Carbopack C (13 mm) + Carbopack B (25 mm) + Carboxen 1000 (13 mm) – comprehensive coverage from C3 to C16 compounds
Our VOCs combined sampling tubes are designed and manufactured to meet the stringent requirements of major international and national standards:
| Standard/Method | Application |
| HJ734-2014 | Stationary source emissions – Determination of VOCs by solid phase adsorption-thermal desorption/GC-MS |
| EPA TO-17 | Determination of VOCs in ambient air using sorbent tubes |
| EN ISO 16017 | Indoor, ambient, and workplace air – Sampling and analysis of VOCs by sorbent tube/thermal desorption/GC |
| GB50325-2020 | Indoor environmental pollution control standard for civil buildings |
| GB/T18883-2002 | Indoor air quality standard |
VOCs Combined Sampling Tube Applications
Environmental Monitoring
Industrial & Occupational Hygiene
Indoor Air Quality (IAQ)
Soil & Vapor Intrusion

VOCs Combined Sampling Tube Packing & Loading
10 or 12 pcs/box

Why Choose Us?
Industry Expertise: Years of specialized experience in environmental monitoring consumables manufacturing
Quality Assurance: Rigorous quality control at every production stage to ensure batch-to-batch consistency
Regulatory Compliance: Products designed to meet the latest international and Chinese standards
Customization Capability: Flexible manufacturing to accommodate
Competitive Pricing: Premium quality at cost-effective price points
Contact Us
For technical specifications, customized solutions, or to place an order, please contact our sales team. We are committed to providing professional products and responsive service to support your VOCs monitoring needs.
Contact: Mr. Rao
Phone: +86-153 0846 7103
Tel: +86 731 8504-7708
Email: info@jinxi-steel.com
Add: No. 568,Chuanggu Industrial Park, Queyuan Road, Tianxin District, Changsha City, Hunan Province, P.R.China.
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