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NidaCon International AB

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PureSperm 40/80/90

Ready-diluted to save gradient preparation time.

All the advantages of a PureSperm 100 gradient, plus ready-diluted to save preparation time. PureSperm 40, PureSperm 80 in both 100mL & 20mL and PureSperm 90 in 100mL, are formulated to minimize sudden pH and osmolarity changes during the transition of sperm from the semen sample to the fertilization medium. This helps to avoid premature hyperactivation and improves fertilization potential. Watch video tutorial here.

    • PureSperm 40, PureSperm 80 and PureSperm 90 are formulated to minimize sudden pH and osmolarity changes during the transition of sperm from a semen sample to the fertilization medium. This helps to avoid premature hyperactivation and improves fertilization potential.
    • PureSperm 40, PureSperm 80 and PureSperm 90 maintain pH between 7.4 – 7.8 at room temperature (17 to 27°C) and at 37°C, providing suitable conditions for good sperm motility, survival time, and fertilization potential.
    • The preparation contains glucose as a usable energy substrate for normal cell metabolism and sperm function.
    • The gradient enables motile sperm to be separated from extraneous cells and seminal plasma. In addition, damage to sperm DNA and structural molecules caused by reactive oxygen species (ROS) is minimized by the effective removal of immature sperm and lymphocytes. Bacteria, epithelial cells, and cell debris are also separated from the motile sperm, which can be difficult to achieve in polysucrose-based gradient preparations.
    • Silane-coated silica
    • Potassium chloride
    • Sodium chloride
    • Purified water
    • HEPES
    • EDTA
    • Glucose
    • Sodium pyruvate
    • Calcium chloride

    Performance Characteristics

    • pH: 7.4 – 7.8.
    • Osmolality (mOsm/kg H2O) : 300 – 310.
    • Endotoxin transfer during treatment : <1.0 EU/mL.
    • Sperm survival 18 hours after density gradient separation: >70%.
    • Contents are tested by human sperm survival.
    • Bottles and stoppers are M.E.A. tested.
    • Store unopened bottles at 2 to 27ºC and avoid temperatures above or below these values. Under these conditions PureSperm 40, PureSperm 80 and PureSperm 90 have a shelf-life of 24 months from production. The expiry date is shown on both bottles and cartons.
    • Open and close bottles under aseptic conditions. After opening, store at 2 to 8ºC when not in use. Shelf-life on the product label applies when the product is stored according to manufacturer’s recommendations.
    • No antibiotics, unstable additives or preservatives have been added by the manufacturer to PureSperm 40, PureSperm 80 and PureSperm 90.
    • When retrieving the sperm pellet, follow the instructions given in the pack insert to avoid inadvertent contamination.
    • Use aseptic procedures at all times.
    • If available, use sealed centrifuge buckets during centrifugation to avoid creation of aerosols.
    • Clean accidental spills using a dampened cloth or paper.PureSperm 40, PureSperm 80 and PureSperm 90 cause floors and benches to be extremely slippery.
    • PureSperm 40, PureSperm 80 and PureSperm 90 do not represent any kind of fire or combustion hazard. A material safety data sheet is available from the distributor or manufacturer(see
    • Do not use any solution which shows evidence of bacterial contamination.
    • Do not use contents if tamper-evident seal is broken.
    • Federal Law (USA) restricts this device to sale by or on the order of a physician.
    • Please check for regulatory compliance governing the use of ART products in your country.
  • It can be extremely difficult to obtain a high yield of motile sperm from highly viscous, semen samples. Nidacon has developed a method that can be helpful in solving this problem in the lab. You simply add PureSperm Buffer to the ejaculate, incubate for 15-30 minutes at 37°C and the sample is ready to use with reduced viscosity. Importantly, this will give you a much higher yield of motile sperm.


    For sperm preparation from a viscous semen sample:
    1. Bring all solutions to room temperature (17 to 27°C).
    2. Measure the volume of the semen sample.
    3. Dilute 1+2 , 1 part PureSperm Buffer and 2 parts semen sample
    (e.g. 0.5 ml PureSperm Buffer + 1.0 ml semen sample).
    4. Incubate at 37°C for 15-30 minutes.
    5. Mix using a pipette.
    6. Ready for sperm preparation on a density gradient.

  • Article No. / Name / Volume
    PSK-020 / PureSperm 40/80 / 2 × 20 mL
    PS40-100 / PureSperm 40 / 100 mL
    PS80-100 / PureSperm 80 / 100 mL
    PS90-100 / PureSperm 90 / 100 mL

  • SDS – View PDF

    Product insert (latest version) – View PDF 40/80/90

    For other languages, contact Nidacon

  • Comparative proteomic analysis of spermatozoa isolated by swim-up or density gradient centrifugation

    Stefania Luppi1, Monica Martinelli1, Elisa Giacomini2, Elena Giolo1, Gabriella Zito2, Rodolfo C Garcia3† and Giuseppe Ricci12*†
    Reproductive Biology and Endocrinology 2015, 13:36

    Comparison of the DNA Fragmentation and the Sperm Parameters after Processing by the Density Gradient and the Swim up Methods

    Iraj Amiri, Marzieh Ghorbani, Safora Heshmati
    Journal of Clinical and Diagnostic Research. 2012 November, Vol-6(9): 1451-1453

    Comparative study of the effects of three semen preparation media on semen analysis, DNA damage and protamine deficiency, and the correlation between DNA integrity and sperm parameters.

    Charoenchai Chiamchanya, Nattpawit Kaewnoonual, Pachara Visutakul, Sirikul Manochantr and Jirattikan Chaiya.
    Asian J Androl. 2010 Mar;12:271-277.

    The use of two density gradient centrifugation techniques and the swim-up method to separate spermatozoa with chromatin and nuclear DNA anomalies.

    Sakkas D, Manicardi GC, Tomlinson M, Mandrioli M, Bizzaro D, Bianchi PG, Bianchi
    U.Hum Reprod. 2000 May;15(5):1112-6.

    DNA fragmentation of spermatozoa and assisted reproduction technology.

    Henkel R, Kierspel E, Hajimohammad M, Stalf T, Hoogendijk C, Mehnert C, Menkveld R, Schill WB, Kruger TF.
    Reprod Biomed Online. 2003 Oct-Nov;7(4):477-84.

    Recovery and survival of sperm is higher with PureSperm density gradient than swim-up in neat and cryopreserved-thawed semen specimen.

    P Ranganathan, A Agarwal
    Fertil Steril, 2001

    Comparative study on density gradients and swim-up preparation techniques utilizing neat and cryopreserved spermatozoa.

    Allamaneni SS, Agarwal A, Rama S, Ranganathan P, Sharma RK.
    Asian J Androl. 2005 Mar;7(1):86-92.

    Bacterial contamination and sperm recovery after semen preparation by density gradient centrifugation using silane-coated silica particles at different g forces

    C.M. Nicholson L. Abramsson, S.E. Holm and E. Bjurulf
    Human Reproduction, Vol. 15, No. 3, 662-666, March 2000

    The use of PureSperm, mini-Percoll and swim-up preparation techniques to separate spermatozoa with chromatin and nuclear DNA anomalies.

    M. Tomlinson et al
    Abstract Andrology in the nineties 1999

    Higher rates of recovery with PureSperm density gradient compared to ISolate

    Agarwal, A. and Ranganathan, P.ESHRE 2001

    A comparison of two density gradient preparations for sperm separation for medically assisted conception: Effect on recovery, clean-up, motility, and motion parameter.

    J. A. Roudebush, et al.
    Supplement of the 27th Annual Meeting of American Society of Andrology, 81 Seattle, USA (March/April 2002)

    Comparison of Six Density Gradient Media for Selection of Cryopreserved Donor Spermatozoa

    Nathalie Mousset-Siméon, Nathalie Rives, Lydie Masse, Florence Chevallier and Bertrand Mace
    Journal of Andrology, Vol. 25, No. 6, November/December 2004

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