Cytiva in Nepal

Qualitative Papers

• Grades 1–6 and 602h, 2.5 to 25 µm
• Grade 1: the everyday lab filter paper
• Circles, sheets and rolls

Clarifying liquids, soil and food testing

Wet-Strengthened & Folded

• Grades 91, 93, 113, 114, 1573
• Resin-strengthened for high wet strength
• Fluted, pyramid and quadrant-fold, ready to use

Fast routine filtration, no folding

Quantitative Ashless

• Grades 40, 41, 42, 43, 44 and 589
• 0.007% ash nominal
• For gravimetric work and instrument sample prep

Gravimetric analysis, AAS/ICP prep

Hardened Grades

• Low ash 50, 52, 54 (0.015% ash)
• Ashless 540, 541, 542 (≈0.006% ash)
• Acid-hardened: strong acid and alkali resistant

Büchner filtration, cement silica tests

Glass Microfibre

• GF/A, GF/B, GF/C, GF/D, GF/F, 934-AH
• Borosilicate, usable up to 550 °C
• RTU pre-weighed filters for TSS/TDS (SM 2540)

Water, wastewater and air particulates

Quartz & Air Monitoring

• QM-A, QM-B, QM-H quartz filters, to 800–900 °C
• Pallflex TissuQuartz and Emfab filters
• PM2.5 PTFE membranes with support ring

Stack, PM2.5/PM10 and trace-metal sampling

Choosing a grade

µm = particle retention in liquid · *Herzberg speed, seconds per 100 mL (higher = slower) GRADE TYPE µm SPEED* ASH % 1 Qualitative 11 150 0.06 2 Qualitative 8 240 0.06 4 Qualitative 20–25 37 0.06 5 Qualitative 2.5 1420 0.06 40 Ashless 8 340 0.007 41 Ashless 20–25 54 0.007 42 Ashless 2.5 1870 0.007 GRADE TYPE µm SPEED* ASH % 50 Hardened low ash 2.7 2685 0.015 540 Hardened ashless 8 200 0.006 541 Hardened ashless 20–25 34 0.006 542 Hardened ashless 2.7 2510 0.006 GF/A Glass microfibre 1.6 62 — GF/C Glass microfibre 1.2 100 — GF/F Glass microfibre 0.7 325 — Also: seed germination papers, grades for soil, sugar and textile testing, and activated-carbon filters for air monitoring.

Membrane Filters

• MCE plain and gridded, cellulose nitrate
• Regenerated cellulose and cellulose acetate
• PTFE, to 120 °C, for solvents and venting

Microbiology, HPLC and particle analysis

Track-Etched & Anodisc

• Nuclepore and Cyclopore polycarbonate
• Black membranes for epifluorescence
• Anodisc alumina: 0.02, 0.1, 0.2 µm

Microscopy, SEM and precise cut-offs

Puradisc & Uniflo

• Syringe filters for up to 100 mL
• 4–30 mm; nylon, PES, PTFE, PVDF, CN
• Sterile and non-sterile options

Routine HPLC and aqueous sample prep

GD/X, SPARTAN & Anotop

• GD/X: GMF prefilter, 3–7× more sample
• SPARTAN: RC, HPLC-certified at 210/254 nm
• Anotop and Anotop IC (alumina)

Difficult, HPLC and IC samples

Pall Acrodisc

• Supor PES: high flow, low protein binding
• 13–37 mm, gamma-sterile options
• PF and Serum versions with prefilter

Sterile filtration and cell culture

Filter Vials

• Mini-UniPrep: filter straight into an autosampler vial
• UniPrep and Autovial (5 and 12 mL)
• No syringe needed

High-throughput HPLC prep

Centrifugal Devices

• Nanosep, Microsep, Macrosep, Jumbosep, Vivaspin
• From < 50 µL to 60 mL; 1 kD to 0.45 µm
• Over 90% recovery

Concentration, desalting, buffer exchange

Inline, Capsule & Bottle-Top

• Polydisc, Polycap and PolyVENT capsules
• Inline filter/degassers for HPLC lines
• VacuCap bottle-top filters, 100 mL–5 L

Mobile phase, media and larger volumes

AcroPrep Filter Plates

• 24-, 96- and 384-well formats
• Lysate clearance, DNA/protein clean-up
• Ultrafiltration and solvent filtration

High-throughput sample prep

Glass Vacuum Filtration

• Borosilicate glass assemblies and funnels
• Graduated funnels, precision-ground seals
• 3-piece funnels for glass microfibre

Autoclavable; HPLC solvent filtration

Stainless Steel Hardware

• MV 050 vacuum units, usable to 200 °C
• AS 300 and 600 three/six-place manifolds
• Inline and syringe filter holders

Durable, reusable and autoclavable

Sentino Microbiology Pump

• Small footprint, disposable fluid path
• Magnetic funnels for one-handed use
• Aseptic one-touch membrane dispenser

Membrane filtration microbiology

Funnels & Manifolds

• MicroFunnel ready-to-use disposable funnels
• MBS I system: 100 and 350 mL funnels
• Laboratory manifolds and forceps

Water, beverage and bioburden testing

Extraction Thimbles

• High-purity cellulose thimbles
• Single and double thickness
• Glass and quartz microfibre options

Soxhlet fat and pesticide extraction

Lab Papers

• Chromatography and blotting papers
• Benchkote bench protector
• Weighing boats, phase separator, lens tissue

Everyday lab essentials

pH & Test Papers

• pH 0–14 and narrow-range strips and rolls
• Colour-bonded dyes that do not leach
• Litmus, Congo red, lead acetate papers

Quick checks in lab and field

903 Sample Collection Cards

• Collect blood and body fluids as dried spots
• No refrigeration needed
• 5-spot and snap-apart formats

Blood and biological fluid storage

Lab-Scale TFF & Capsules

• Minimate EVO TFF, samples up to 1 L
• AcroPak sterile capsules, Supor EKV
• Acro vent devices for bioreactors

Concentration, diafiltration, sterile media