The quiet workhorse of sample integrity

ZF-ZSL2 – 17mm PTFE Syringe Filter with Luer Lock (0.2μm/0.3μm)

Sample preparation is the invisible bottleneck of analytical chemistry. A single contaminated injection can degrade column performance, void calibration curves, and erase hours of instrument time. The ZF-ZSL2 exists to eliminate that risk with the simplest possible intervention: a disposable, chemically inert filter.

Its PTFE membrane is the critical specification. Unlike nylon or PVDF, PTFE withstands aggressive organic solvents — acetonitrile, tetrahydrofuran, dichloromethane — that dissolve standard filter media. The 0.2μm pore size retains particulates and microbial contaminants, while the 0.3μm variant offers higher flow for less demanding applications. Both connect via Luer Lock, a standard that ensures secure attachment to syringes and autosampler ports.

The housing is medical-grade ABS, selected for its dimensional stability during sterilization. At 17mm membrane diameter, the unit balances filtration capacity against dead volume — enough for 2-5 mL sample volumes without excessive hold-up. The 1.5g mass reflects the logic of disposable labware: cheap enough to discard, reliable enough to trust.

Production takes place in Rizhao, Shandong, where Zhenfu operates an ISO-accredited facility with daily output of 20,000 units. That scale supports the zero-MOQ ordering policy — a procurement flexibility more common in China’s laboratory consumables sector than in Western equivalents. CE certification covers European regulatory requirements, though the product’s primary markets likely extend across Asia and into contract labs serving pharmaceutical R&D.

China’s role here is not innovation but standardization. The PTFE syringe filter is a mature product, yet consistency of manufacture — membrane integrity, bond strength between housing and media, lot-to-lot reproducibility — separates credible suppliers from commodity traders. A 20,000-unit daily line, combined with a three-year shelf life, suggests Zhenfu has matched process control to volume.

The ZF-ZSL2 reveals how unglamorous components underpin analytical infrastructure. In labs where solvent purity determines data quality, a 1.5g filter is not an afterthought — it is the last line of defense.

Why it matters:
For labs running high-throughput HPLC or working with aggressive solvents, the ZF-ZSL2 eliminates a common failure point at negligible cost. Its availability without minimum order requirement reduces procurement friction for small facilities and academic groups.

View Product →