Molded Crimp Headspace Vial

10ml, 20ml, 30ml, 50ml and 100ml molded crimp headspace vial is widely used in Headspace and GC, GCMS application.

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Categories: Chromatography Consumables, Chromatography Vials Tags: alw, Molded Crimp Headspace Vial

1) Description

Molded Crimp Headspace Vials, also known as ND20 vials, are clear glass containers designed specifically for headspace analysis in laboratory settings. These vials are available in various capacities to meet different analytical needs, including 10mL, 30mL, 50mL, and 100mL.

2) Application

Headspace Analysis: Ideal for gas chromatography (GC) and headspace sampling applications, where the analysis of volatile compounds in the headspace above the sample is critical.

Pharmaceutical Testing: Used in the pharmaceutical industry for the analysis of residual solvents and other volatile impurities.

Environmental Testing: Suitable for the detection of volatile organic compounds (VOCs) in environmental samples.

Food and Beverage Testing: Utilized in the food and beverage industry to analyze the presence of flavor compounds, preservatives, and other volatile substances.

Forensic Analysis: Employed in forensic laboratories for the examination of volatile substances in various samples.

3)Features

▶ High-Quality Glass: Made from clear molded glass, ensuring excellent visibility and chemical inertness.

▶ Standardized Dimensions: Designed with a 20mm crimp neck and a flat bottom for consistent compatibility with headspace analysis equipment.

▶ Volume Options: Available in multiple volumes (10mL, 30mL, 50mL, 100mL) to cater to various testing requirements.

▶ Durability: The molded construction provides strength and durability, making them suitable for high-pressure environments.

▶ Leak-proof Seal: The crimp neck design ensures a tight, leak-proof seal when used with compatible crimp caps.

CAT.NO.	Description	Packaging
C0002732	10mL Molded Clear Glass 25.4×53.5mm 20mm Square Rim Flat Bottom Crimp Headspace Vial.	768 pcs/Carton
C0003481	20mL Molded Clear Glass 32x58mm 20mm Square Rim Flat Bottom Crimp Headspace Vial.	480 pcs/Carton
C0002733	30mL Molded Clear Glass 36×62.8mm 20mm Square Rim Flat Bottom Crimp Headspace Vial.	276 pcs/Carton
C0002734	50mL Molded Clear Glass 42.5x73mm 20mm Square Rim Flat Bottom Crimp Headspace Vial.	336 pcs/Carton
C0002735	100mL Molded Clear Glass 51.6×94.5mm 20mm Square Rim Flat Bottom Crimp Headspace Vial.	189 pcs/Carton
C0003477	300mL Molded Clear Glass 70x143mm 32mm Square Rim Flat Bottom Crimp Headspace Vial.	/
C0003510	10mL Molded Amber Glass 25.4×53.5mm 20mm Square Rim Flat Bottom Crimp Headspace Vial.	768 pcs/Carton
C0003511	20mL Molded Amber Glass 32x58mm 20mm Square Rim Flat Bottom Crimp Headspace Vial.	480 pcs/Carton
C0003512	30mL Molded Amber Glass 36×62.8mm 20mm Square Rim Flat Bottom Crimp Headspace Vial.	276 pcs/Carton
C0003513	50mL Molded Amber Glass 42.5x73mm 20mm Square Rim Flat Bottom Crimp Headspace Vial.	336 pcs/Carton
C0003514	100mL Molded Amber Glass 51.6×94.5mm 20mm Square Rim Flat Bottom Crimp Headspace Vial.	189 pcs/Carton

Product Name	ALWSCI^®MoldedCrimp Headspace Vial
Neck Type	Crimp
Vial Colors	Clear/ Amber
Bottom Types	Flat Bottom
Volume	10mL/ 20ml/ 30ml/ 50ml/ 100ml/ 300ml

Black 8-425 Open Top Screw Closures

Categories: Caps & Septa, Chromatography Consumables

2ML Certified 9-425 Vial Kit

ALWSCI Certified vials are tested for cleanliness by HPLC and held to tightest dimensional tolerances in the industry.

Categories: Chromatography Consumables, Chromatography Vials

12ML Breath Testing Vial – Coated – Non Evacuated

ALWSCI® 12ML Breath Testing Vial, as a product of the breath testing series, is specially designed to solve the accuracy and reliability problems of breath testing.

Categories: Chromatography Consumables, Chromatography Vials

SPE Cartridges

High-performance SPE cartridges with customizable sorbents and formats for efficient, reliable sample cleanup across a wide range of analytical workflows.

1) Description

Our Solid Phase Extraction (SPE) cartridges are designed for reliable and efficient sample preparation in analytical, environmental, food, and pharmaceutical laboratories. Available in a wide range of bed masses, volumes, and sorbent phases, these cartridges ensure consistent performance for trace-level enrichment, cleanup, and fractionation.

Made from high-purity medical-grade polypropylene, our cartridges are compatible with SPE systems. With customizable configurations including C18, Silica, PSA, NH₂ and more, they provide flexible solutions for diverse sample matrices and analytical methods.

2) Features

▶ Wide Sorbent Selection: Available with C18, Silica, PSA, NH₂, and custom sorbents to suit various analyte chemistries.
▶ Multiple Bed Masses & Volumes: Common formats include 3 mL and 6 mL with bed masses from 200 mg to 1000 mg, adaptable to method requirements.
▶ High Purity Polypropylene Housing: Free from extractables and compatible with most organic solvents.
▶ Excellent Flow Consistency: Uniform packing ensures minimal channeling and optimal retention/recovery rates.
▶ Standard connection Format: Compatible with positive pressure manifolds, vacuum manifolds, and automated SPE instruments.
▶ Secure Packaging: Packed in cleanroom environments; standard pack sizes include 30 or 50 pcs per bag.

3) Application

Environmental Analysis: Pre-treatment of water, soil, and wastewater samples for pesticide, PAH, PFAS, and heavy metal testing.

Food Safety Testing: Extraction of veterinary drug residues, mycotoxins, or additives from food matrices.

Pharmaceutical and Biomedical Research: Sample cleanup prior to LC-MS, GC-MS, and HPLC analysis.

Forensic and Clinical Studies: Extraction of drugs, metabolites, or biomarkers from biological fluids.

General Analytical Chemistry: Clean-up and enrichment of trace organic and inorganic analytes.

4) Sorbent Selection Guide by Target Compound Type

Target Compound Type	Recommended Sorbent(s)	Retention Mechanism	Typical Sample Types	Notes
Non-polar compounds (e.g., pesticides, PAHs, steroids)	C18, C8	Hydrophobic interaction	Water, serum, urine, plant extracts	C18 offers stronger retention than C8; ideal for reversed-phase cleanup
Moderately polar compounds (e.g., phenols, mycotoxins)	C18, Polymeric RP (e.g., PS-DVB)	Hydrophobic + π-π interaction	Food, biological fluids	Polymeric sorbents are more water-wettable, suitable for polar solvents
Highly polar compounds (e.g., organic acids, catechols)	HLB, NH₂, Diol	Hydrogen bonding, dipole-dipole	Urine, environmental water	HLB retains a broad range; NH₂ useful for weak anion exch. or polar groups
Weak acids (e.g., carboxylic acids, ibuprofen)	SAX, NH₂	Anion exchange	Plasma, pharmaceutical	SAX strongly retains acidic groups; pH optimization required
Weak bases (e.g., amines, alkaloids, β-blockers)	SCX, CM, Cation-Exchange HLB	Cation exchange	Plant extract, drugs in serum	SCX retains positively charged species; elution with NH₄OH or MeOH
Neutral small molecules (e.g., caffeine, parabens)	C18, Polymeric RP	Hydrophobic	Beverage, urine, cosmetics	Use mild elution to avoid co-extracting matrix
Aromatic compounds (e.g., benzene derivatives, flavonoids)	GCB, Phenyl	π-π interaction	Tea, herbal extracts, soil	GCB excels at planar aromatic removal; may adsorb target-test recovery
Sugars, sugar alcohols (e.g., glucose, mannitol)	Amine, Diol	Normal-phase	Beverage, fermentation broth	Not ideal for reversed-phase; use in NP or HILIC mode
Peptides / proteins (cleanup purpose)	C18 (for peptide), GCB (for protein removal)	Size exclusion / interaction	Serum, plasma	Use protein precipitation prior to SPE for better recovery
Hormones & endocrine disruptors (e.g., estradiol, BPA)	HLB, C18, CN	Hydrophobic, mixed-mode	Environmental water, cosmetics	HLB provides broader range capture for trace organics
Pesticides (polar & non-polar)	C18, GCB/PSA combo, QuEChERS + SPE	Multi-mode	Fruit/vegetables, grains	Use multi-layer or tandem SPE for complex matrix cleanup

Categories: Chromatography Consumables, SPE

Welded MCE Sterile Syringe Filter

Labfil® Welded MCE Sterile Syringe Filter is a high-performance filter suitable for a variety of laboratory and industrial applications, providing reliable sample purification and separation solutions.

Product Name	Welded MCE Sterile Syringe Filter
Material	MCE
Material of Housing	PP
Effective Filtration Area	13mm/0.72cm²	25mm/3.4cm²	30mm/4.5cm²
Pore Size	0.22 μm /0.45 μm
Process Volume	＜10mL(13mm)	＜100mL(25mm)	＜150mL(30mm)
Maximum Operating Temperature	40 ℃-55 ℃
Maximum Operating Pressure	29 psi-87 psi
PH	3-10
Application	Biological Research, Chemical Analysis, Drug Preparation, Food and Beverage Testing
Package	50/100 pcs Packed in one Carton

Categories: Chromatography Consumables, Sample Filtration Tags: alw, Welded MCE Sterile Syringe Filter Brand: ALW

Crimp Headspace Vial

Categories: Chromatography Consumables, Chromatography Vials Brand: ALW

Screw Headspace Vial

10ml and 20ml screw headspace vial is widely used in Headspace and GC, GCMS application.

Categories: Chromatography Consumables, Chromatography Vials Brand: ALW

White 8-425 Open Top Screw Closures

ALWSCI is one of the leading China 8-425 screw thread caps with septa manufacturers and suppliers, welcome to wholesale cheap 8-425 screw thread caps with septa, ptfe liner from us.

Categories: Caps & Septa, Chromatography Consumables Brand: ALW

ICP-MS Plastic Sample Tube

Elemental analysis, analysis of metals and non-metals.

Product	ICP-MS Plastic Sample Tube
Material	Polypropylene PP
Volume	16 mL
Color	Translucent
Capped	NO
Application	For ICP MS Analysis.

Categories: Chromatography Vials, Chromatography Consumables Tags: alw, ICP-MS Plastic Sample Tube Brand: ALW

8-425 Open Top Screw Closures Pre-Slit

Zhejiang ALWSCI Technologies Co.,Ltd is one of the leading China 8-425 screw thread caps with septa manufacturers and suppliers, welcome to wholesale cheap 8-425 screw thread caps with septa, ptfe liner from us.