8-425 Caps & Silicone Septa

Description

Feature

Specification

Application

Product

FAQ

Packing and Delivery

Precision Sealing for Volatile Lab Samples

Our 8-425 small opening design minimizes solvent evaporation during long-sequence HPLC/GC runs, ensuring analytical consistency.

The precisely calibrated 1.5mm thickness of our vial septum ensures a zero-clearance mechanical fit within the 8-425 thread. This design eliminates the risk of septum dislodgement or vacuum formation during high-speed aspiration, maintaining the integrity of volatile samples even during unattended 48-hour sequence runs.

Advanced Silicone Septa Technology

High-purity materials for reliable chromatography results.

Platinum-cured silicone septa for ultra-low bleed.

Chemically inert PTFE layer resists aggressive lab solvents.

Multiple vial septum slit options (Y-slit, Cross).

Precision 1.5mm thickness ensures zero-leakage fit.

Customizable lab seals available for unique specs.

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Ensuring Lab Compatibility

Procurement Decision Support

Material Purity & Sample Integrity

Selection Guide by Lab Application

Thread Standard	8-425 GPI Standard	Agilent, Waters, Shimadzu, Varian
Vial Type	Small Opening Vials	All 2mL 8-425 Screw Neck Vials
Vial Septum Size	8mm Diameter	Precision fit for 8mm cap aperture
Needle Type	Standard & Thin Gauge	Optimized for 22G to 32G needles
Autosampler	High-throughput systems	Reliable for 24/7 automated sequences

Component	Material Grade	Lab Benefits
Silicone Septa	Ultra-pure, Platinum-cured	Low Bleed: Prevents ghost peaks in GC/MS
Liner Material	High-inertness PTFE	Chemical Shield: Resists DCM, ACN, Hexane
Cap Material	Laboratory-grade PP	No Leaching: Zero plasticizer interference
Hardness	45-55 Shore A	Resealability: Safe for multiple injections
Cleanliness	Dust-free processed	Zero Contamination: Protects trace samples

Application	Recommended Vial S	Primary Advantage
Routine HPLC Analysis	Non-slit White PTFE/Red Silicone	Maximum sealing for standard runs
Sensitive GC/MS Trace	High-purity Silicone Septa	Ultra-clean baseline, no siloxane interference
High-Throughput / Thin Needle	Pre-slit (Y-slit/Cross) Septa	Reduces needle drag and prevents bending
Volatile Sample Storage	Bonded PTFE/Silicone + Closed Cap	Customizable Lab Seals for zero evaporation
Aggressive Acid/Base	Double-sided PTFE (PTFE/Silicone/PTFE)	Dual-layer protection against corrosion

Professional Application Scenarios

Beyond standard specifications, we understand the critical pain points in daily laboratory operations—from baseline noise in MS to needle fatigue in high-throughput systems. Our customizable lab seals and silicone septa are engineered not just to fit a vial, but to provide a robust solution for your most demanding analytical environments.

Eliminating Baseline Ghost Peaks

Struggling with background noise in MS? Our high-purity silicone septa are platinum-cured to eliminate volatile siloxanes. This ensures that your vial septum won't interfere with sensitive analytical peaks, providing a clean baseline for every run.

Protecting High-Cost Auto-Injectors

Frequent needle bending? For labs using fragile 32G needles, our customizable lab seals offer pre-slit options that reduce penetration force by 40%. This protects your robotic arm and prevents expensive instrument downtime.

Maintaining Volatile Sample Integrity

Sample concentration shifting overnight? The 8-425 small opening thread provides a tighter seal than 9mm alternatives. Our vial septum fits with zero clearance, stopping evaporation of volatile organic solvents during long sequences.

Harsh Organic Solvent Resistance

Dealing with DCM or Hexane? Standard seals can swell or leach. Our customizable lab seals can be built with dual PTFE layers, providing a 100% inert barrier that maintains seal integrity even with the most aggressive lab chemicals.

Batch Consistency for Audit Safety

Worried about lab audit documentation? We provide full traceability for every batch of silicone septa. From raw material COA to final QC, we make procurement effortless for lab managers and QA auditors.

24-Hour Confirmed Response & Dispatch Guarantee

We guarantee a confirmed response within 24 hours for all inquiries. For in-stock vial septum, silicone septa, and accessories, orders dispatch within 24 working hours of confirmation. We support customer-specified logistics to ensure your customizable lab seals reach you via preferred carriers.

Can I order customizable lab seals for specific instruments?

Yes. We offer OEM services for cap colors, septa materials, and slit types. We guarantee a confirmed response within 24 hours for all custom feasibility requests.

Is your silicone septa suitable for GC/MS?

Absolutely. Our silicone septa are conditioned to remove impurities, ensuring ultra-low bleed and high sensitivity, which is critical for GC/MS and LC/MS trace analysis.

How soon will my vial septum order ship?

Standard in-stock items dispatch within 24 working hours. We maintain a large inventory of 8-425 closures to ensure your chromatography workflow never stops.

Do you support specified forwarders?

Yes, we support customer-specified logistics. Simply provide your account details (FedEx/DHL/UPS) or nominate your forwarder, and we will handle the rest.

Are these closures compatible with Agilent vials?

Our 8-425 closures follow the international GPI standard, ensuring 100% compatibility with all 8mm small opening vials from Agilent, Waters, and Shimadzu.

Apr

Packing and Delivery

Packing

Each vial is individually protected in shrink-wrapped trays, 100–200 pcs per inner box, then packed into corrugated export cartons.

Labeling

Each carton includes lot number and product information for traceability.

Delivery Time

Normally 7–15 working days after order confirmation.

Shipping Options

Air freight, sea freight, or express (DHL/UPS/FedEx) available upon request.

Storage Condition

Store in a clean, dry environment at room temperature.

Company Profile

Zhejiang Aijiren Technology Co., Ltd.

A dedicated original manufacturer of chromatography and laboratory consumables.

10,000+ m² modern facility with Class 100,000 cleanrooms
Automated production lines and rigorous in-house quality control
High-volume capacity, fast lead times, and reliable global supply
OEM/ODM customization with full batch traceability
Trusted by laboratories and analytical instrument brands worldwide

VR Showroom

OEM/ODM Custom Laboratory Consumables

Aijiren turns your customized requirements—size, material, color, logo, or packaging—into reliable, ready-to-use products.

OEM/ODM

Precise manufacturing based on your drawings and specifications, with one-stop development support

Confidentiality

Full protection of all commercial information, molds, and designs

Stable Supply

Automated production ensures consistent quality and fast lead time

Technical Support

Dedicated team ensures smooth communication and hassle-free delivery

FAQ From Customers (VR Display)

What certificates do you have?

Aijiren is certified to ISO 9001:2015 by SGS, ensuring controlled manufacturing processes and stable, fully traceable product quality.

With continuous investment in R&D and multiple independent patents, we deliver high-performance and reliable consumables to laboratories worldwide.

Some of the certificates of Aijiren are displayed

What’s the MOQ? Do you accept small orders?

Aijiren supports both standard and small batch orders. While MOQ varies by product type, we are happy to accommodate smaller quantities for trial, testing, or special projects. Please contact us for specific requirements. aijiren Quality control

Is the quality guaranteed?

All Aijiren products undergo random sampling and multiple in-house quality tests. Each batch is fully traceable, ensuring stable and reliable performance for your laboratory work.

What kind of after-sales support does Aijiren provide?

Aijiren provides practical after-sales support:

● Returns & replacements: Any product affecting use or sales can be returned or replaced.

● Technical support: Assistance with product use and troubleshooting.

● Order tracking & follow-up: We monitor shipments and follow up to ensure timely delivery.

● Dedicated contact: Aijiren provides a direct contact for after-sales inquiries.

This ensures your laboratory work runs smoothly with minimal disruption.

How long will it take for orders?

The delivery time depends on the order quantity and whether customization is required:

In-stock products: shipped within 3–7 days after payment
Standard bulk orders: shipped within 2–4 weeks
OEM/ODM customized products: shipped within 3–5 weeks (depending on mold, logo, color, packaging, etc.)
Aijiren has automated production lines and a 100,000-class cleanroom, ensuring stable lead times and reliable supply.