MCE Membrane Filter

MCE Mixed Cellulose Ester Membrane Filters are commonly used for microbial analysis due to their uniform pore size distribution and high porosity.

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Categories: Chromatography Consumables, Sample Filtration Tags: alw, MCE Membrane Filter

1) Description

MCE membrane filters are made from mixed cellulose esters, a material that provides uniform pore size and high porosity, which is critical to ensuring filtration accuracy. MCE membrane filters usually hydrophilic, which means that aqueous solutions can be filtered without prewetting.

2) Application

MCE membranes are often used for microbiological testing, such as bacterial culture in environmental monitoring and food safety testing. MCE filters are also used for air and water quality monitoring, and in clinical laboratories as part of diagnostic testing.

3)Features
▶ Ideal for capturing and culturing microorganisms in the Water and wastewater industry.

▶ Used to determine particulate contamination of lubricating oil and hydraulic fluid in patch test kits.

▶ Compatible with gamma irradiation.

Cat. NO.	Diameter	Pore Size	Description	Package
C0000879	13 mm	0.22 μm	MCE Membrane.	200 pcs/pk.
C0000880	13 mm	0.45 μm	MCE Membrane.	200 pcs/pk.
C0000881	25 mm	0.22 μm	MCE Membrane.	100 pcs/pk.
C0000882	25 mm	0.45 μm	MCE Membrane.	100 pcs/pk.
C0000311	47 mm	0.22 μm	MCE Membrane.	100 pcs/pk.
C0000313	47 mm	0.45 μm	MCE Membrane.	100 pcs/pk.
C0001636	50 mm	0.22 μm	MCE Membrane.	100 pcs/pk.
C0001637	50 mm	0.45 μm	MCE Membrane.	100 pcs/pk.
C0000312	90 mm	0.22 μm	MCE Membrane.	100 pcs/pk.
C0000314	90 mm	0.45 μm	MCE Membrane.	100 pcs/pk.

Product Name	Labfil^®MCE Membrane Filter
Material	MCE
Diameter	13/ 25/ 47/ 50/ 90 mm
Pore Size	0.22 μm /0.45 μm
Colors	White
PH	3-10
Package	200/ 100 pcs Packed in one Box

Crimp Headspace Vial

Categories: Chromatography Consumables, Chromatography Vials Brand: ALW

50mm Vent Filter

Self-contained, compact filtration unit for removing bacteria and particles from the air.

Category: Chromatography Consumables 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.

Categories: Caps & Septa, Chromatography Consumables

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

Barcoded Vials & 2D Barcode Vials

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

2ML 9-425 Amber Screw Vial Graduated With Marking Spot

C0000011 2mL Amber Glass 12x32mm Flat Base 9-425 Screw Thread Vial with Label. 100pcs/pk.

Product Name	ALWSCI^®2ML 9-425 Amber Screw Vial Graduated With Marking Spot
Material	Borosilicate Glass
Neck Type	Screw Thread
Vial Size	12×32mm
Volume(Metric)	2 ML
Vial Color	Amber
Bottom	Flat
Cap Included	NO
Application	For LC/GC
Packaging	100 pcs Packed in one Box

Categories: Chromatography Consumables, Chromatography Vials Tags: alw, ALWSCI® 2ML 9-425 Amber Screw Vial Graduated With Marking Spot Brand: ALW

Sample Vial Kit Package

ALWSCI is supplying wide range of sample vials, from 2ml to 60ml, Clear/ Amber, used in laboratory. pre-assembled.

Categories: Chromatography Consumables, Chromatography Vials Brand: ALW

GL45 Safety Cap

GL45 Safety Cap is a sealing system designed to improve laboratory safety. Through its innovative sealing and venting features, it effectively prevents chemical leakage and evaporation.

Product Name	ALWSCI^®GL45 Safety Cap
Material	PP+ PTFE
Kit Contents	Air Valve(Including Time Strip)+ PP/Peek Fitting/ PP/Peek Blind Plug
PP/PEEK Fitting Size	1/4”-28 fitting for 1/8” OD tubing
Number of Ports in Cap	2/ 3/ 4
Cap Color	Black
Packgaing	1 pc Packed in one Box

Categories: Caps & Septa, Chromatography Consumables Tags: alw, ALWSCI® GL45 Safety Cap Brand: ALW

12ML Breath Testing Vial – Coated – Non Evacuated