Hydrophilic PTFE Syringe Filters

Hydrophilic PTFE Syringe Filters

The hydrophilic unsupported membrane that ideal for HPLC and mixtures of aqueous and organic solvents. Use with both aqueous and organic solvents, along with their mixtures.



Using Germany /US imported membrane inside
Manufactured in 100,000 class clean room
Variety of membranes, porosities, and diameters available.
Ultrasonic welding ensures no contaminant to samples
Wide range size diameter in supply ( 4, 13, 25, 33, 50mm etc)


Hydrophilic syringe filter
The lowest level of IC extractable
Broad chemical compatibility and flexibility in the lab
optimizing background levels in sensitive IC analyses
Luer Lock Inlet Tip makes secures connections & avoid blow off
Standard1um pre-filter (Glass fiber or PP ) for optimal performance with particulate-laden analyses


Filtration of aggressive organic or highly basic solutions, transducer protectors.
Chemical Compatibility:
1. Compatible with: Aggressive solvents, strong acids, alcohols, bases, aromatics
2. Incompatible with:
Perchloric acid
Methylene chloride (limited exposure)
Dioxane, DMF, formic acid > 50%

Ion Chromatography (IC) on Ion extractable test of Hydrophilic PTFE Syringe Filter(Filstar series)

IC syringe filters are the best choice for ion analysis and consistent results. Its high retention efficiency for fine particles can extend
the life of the IC instrument. The syringe filter is verified by IC with a very low ion interference low background value. Using
ultrasonic welding technology, no leakage risk.
Analysis of Ion Chromatography
1. Sample

Material Diameter Pore Size
Hydrophilic PTFE Φ25mm 0.22μm
Φ25mm 0.45μm

Note: Φ25mm syringe filter because the filter area is larger than Φ13mm, the ion dissolution is also higher, so as the highest ion
dissolution of the sample for testing.
2. Experimental Method
Syringe Filter is filtered 3ml ultra-pure water, the first 1ml discard, collect the first 2ml filter water and go on tested by IC Cl-,
NO3-, SO42-. Each sample was repeated three times. Ultra-pure water directly tested by IC act as blank sample for comparison.
3. Instruments
Shimadzu Ion Chromatograph HIC-SP / HIC-NS (as the right picture)
4. Test Results

Pore Size Ion 1# 2# 3#
0.22μm Cl ND ND ND
0.45μm Cl ND ND ND

Technical Data

Filter Media Hydrophilic PTFE
Diameter 4mm 13mm 25mm 33mm 50mm
Housing Medical PP Medical PP Medical PP Medical PP Medical PP
Pore Size 0.22μm, 0.45μm
Filtration Area 0.2cm2 1.3cm2 4.9cm2 8.5cm2 19.8cm2
Maximum Pressure 5.2bar 5.2bar 5.2bar 5.2bar 5.2bar
Process Volume 2mL 10mL 100mL 200mL 5000mL
Pre-filter 1um GF or PP 1um GF or PP 1um GF or PP 1um GF or PP 1um GF or PP
Hold-up Volume < 10uL < 50uL < 100uL < 200uL < 350uL
Inlet Female Luer Lock Female Luer Lock Female Luer Lock Female Luer Lock Stepped barb
Outlet Male luer slip Male luer slip Male luer slip Male luer slip Stepped barb
Operate temperature 60℃

Instruction Drawing

syringe filters analysis chart

Ordering Information

Item Code Pore Size(μm) Diameter(mm) Sterile Pre-filter Quantity/pk
SLPT0422NL 0.22 4 No No 100pcs
SLPT0445NL 0.45 4 No No 100pcs
SLPT0422NLP 0.22 4 No PP 100pcs
SLPT0445NLP 0.45 4 No PP 100pcs
SLPT0422NG 0.22 4 No GF 100pcs
SLPT0445NG 0.45 4 No GF 100pcs
SLPT1322NL 0.22 13 No No 100pcs
SLPT1345NL 0.45 13 No No 100pcs
SLPT1322NP 0.22 13 No PP 100pcs
SLPT1345NP 0.45 13 No PP 100pcs
SLPT1322NLG 0.22 13 No GF 100pcs
SLPT1345NLG 0.45 13 No GF 100pcs
SLPT2522NL 0.22 25 No No 100pcs
SLPT2545NL 0.45 25 No No 100pcs
SLPT2522NLP 0.22 25 No PP 100pcs
SLPT2545NLP 0.45 25 No PP 100pcs
SLPT2522NLG 0.22 25 No GF 100pcs
SLPT2545NLG 0.45 25 No GF 100pcs
SLPT3322NL 0.22 33 No No 50pcs
SLPT3345NL 0.45 33 No No 50pcs
SLPT3322NLP 0.22 33 No PP 50pcs
SLPT3345NLP 0.45 33 No PP 50pcs
SLPT3322NLG 0.22 33 No GF 50pcs
SLPT3345NLG 0.45 33 No GF 50pcs
SLPT5022NL 0.22 50 No No 25pcs
SLPT5045NL 0.45 50 No No 25pcs
SLPT5022NLP 0.22 50 No PP 25pcs
SLPT5045NLP 0.45 50 No PP 25pcs
SLPT5022NLG 0.22 50 No GF 25pcs
SLPT5045NLG 0.45 50 No GF 25pcs

We have more than thirty lines for the production of micro-porous Membranes, Syringe filters, Sample vials, Septa and caps, along with Filter Paper, Vacuum pumps and manifolds.

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