Whiteboard Wednesday: The Different Types of Pipettes For Your Laboratory

This week’s Whiteboard Wednesday features different pipette types for your laboratory setting. Today we discuss the different types of pipettes offered on our website, which include:

  • Adjustable Volume
  • Fixed Volume
  • Electronic
  • 8-Channel
  • 12-Channel
  • Repeater
  • Positive Displacement
  • Disposable Polyethylene

Watch today’s Whiteboard Wednesday to learn more about our different pipette styles!

Featured Product: BrandTech BRAND UV-Transparent Spectrophotometry Ultra-Micro Cuvettes

Today, BrandTech’s BRAND UV-Transparent Spectrophotometry Ultra-Micro Cuvettes will be our featured product! These cuvettes are a popular choice for many working in research and testing laboratories.



  • BRAND UV-Cuvette UV-transparent ultra-micro cuvettes are a popular disposable alternative to quartz cuvettes in DNA, RNA, and protein analyses as well as many other applications between 220nm and 900nm.
  • UV-Cuvettes eliminate the tedious and time-wasting cuvette washing, and the risk of sample carry-over associated with reusable quartz cuvettes. Process QC applications avoid the need for qualified SOP’s for cuvette cleaning.
  • The proprietary plastic material offers chemical compatibility superior to that of conventional plastic cuvettes of acrylic or polystyrene, and may be used with most polar organic solvents.
  • Cuvettes have recessed windows to help protect against scratching and fit most commercial spectrophotometers and photometers. They are grouped by mold cavity number to maximize consistency between cuvettes and reduce variation in extinction coefficient.
  • Use the semi-micro size UV-Cuvettes for sample volumes between 1.5mL and 3.0mL, and the macro UV-Cuvettes for samples larger than 2.5mL, or for applications where chemical resistance is primary. Ultra-micro sized UV-Cuvettes may be used with sample volumes as small as 70µL.
  • Individually wrapped UV-Cuvettes micro are free of DNase, DNA and RNase!


  • Filling Volume Minimum: 70uL
  • Filling Volume Maximum: 550uL (15mm window) / 850uL (8.5mm window)
  • Sample Window Dimensions: 2mm x 3.5mm (minimum)
  • Light Path: 10mm
  • Range of Application: 220-900nm

Have any questions regarding our featured product? Let us know in the comment box below!

Whiteboard Wednesday: Improve Your Lab’s Safety With Test Tube Racks

This week on Whiteboard Wednesday we discuss ways to help improve your laboratory’s safety with test tube racks. Chaotic laboratories are a nightmare for lab employees and more importantly can be a major safety hazard! Each year, untidy laboratory work spaces contribute to over 10,000 lab accidents. Fortunately, keeping your lab organized and well kept can prevent many of these accidents. Test tube racks are an excellent tool to use for improving your lab safety.

A few of our favorite test tube rack designs include:

  • Interlocking test tube racks
  • Stack-able test tube racks
  • Plastic test tube racks

Featured Product: 4 oz (118ml) Whirl-Pak Write-On Bags

Today’s featured product comes from our selection of Whirl-Pak specimen bags, the 4 oz. (118ml) Whirl-Pak Write-On Bags!


Whirl-Pak bags made the “universal sample system”, which means that a single sample can be used for all tests required for quality control, product content, and legal compliance.


  • A convenient white Write-On Strip will accept virtually any writing instruments (ballpoint pen, pencil, or felt-tip marker) for easy sample identification
  • Marking for 100ml and 4oz measurements to assist in volume control
  • High-quality blended polyethylene
  • Puncture proof tabs by extending the tape on the tab past the aluminum wire ends eliminating the sharp points which could puncture the bags or gloves
  • Leakproof closure (whirling or tightly folding the tab over 3 times) prevents impurities from entering the bag and contaminating the sample
  • Sterile with +1 Sterilization, a process of sterilizing sealed cartons of Whirl-Pak bags after manufacturing using ethylene oxide gas at an independent ISO-certified facility
  • Not autoclavable
  • Bags should not be used at temperatures above 180°F (82°C)
  • Bags can be frozen to any temperature, even liquid nitrogen temperatures down to -346°F (-210°C); careful handling required after freezing
  • ISO9001 certified
  • FDA approval

Have any questions on the whirl-pak write-on bags? Let us know in the box below!

Proper Pipetting Procedures – Adjustable Pipettes

We have put together a few important steps when it comes to proper pipetting procedures for an adjustable pipette. It’s very important to accurately use your pipette, pipette tips and pipette accessories. If done correctly, the transfer of liquid will be accurate.

  1. If you’re using an adjustable pipette, you must select the volume amount that needs to be transferred. You can do this by rotating the volume selector wheel to the correct volume. (Tip: Always go higher then the desired volume, then slowly turn the wheel down to the needed volume.)
  2. Then you will need to choose the correct pipette tip. When attaching, you must firmly press the shaft of the pipette into the wider opening of the tip for a good seal.  (Tip: Do not force the shaft into the tip, it could potentially cause damage over time.)
  3. Place either your index finger or thumb over the top of plunger and press to the first stopping point. Hold the plunger in this position.
  4. Place your pipette tip into your sample and let up on the plunger to allow the sample to rise into the tip. Also, make sure your pipette is vertical or within a 20 degree angle. (Tip: Do not remove your thumb from the plunger or let the plunger rise up fast because your sample volume might dispense incorrectly.)
  5. You will want to make sure you don’t have any bubbles in the pipette tip after the aspiration of the sample fluid is complete.
  6. Remove the pipette tip from the sample and wipe off excess fluid from outside of tip. (Tip: Be careful not to touch the bottom of the tip)
  7. To dispense the liquid sample into a receiving tube, press the plunger down slowly and steadily pass the first stop all the way to the bottom. Wait approximately 2 seconds to allow complete dispensing of sample into receiving unit.
  8. Then remove the tip from the wall of the receiving unit and release the plunger.
  9. Then simply dispose the pipette tip by pressing the ejector button to remove the tip and dispose in the appropriate bio-hazard container depending on your facility’s guidelines.

As always, following your facility’s guidelines and laboratory rules is highly recommended. If you have any questions regarding this post, please let us know in the comment box below!

Featured Product: Culture Tubes and Caps

Today’s featured product is our disposable culture tubes and caps! These disposable sterile round bottom culture tubes are made of high quality Polypropylene (PP) plastic or crystal clear Polystyrene (PS).



  • Polypropylene (PP) Tubes will withstand temperatures from -190° to +120°C and may be centrifuged at up to 4000xg
  • Polystyrene (PS) Tubes will withstand with a more limited temperatures range of 0° to 70°C and may be centrifuged at up to 2000xg
  • Caps are made of polyethylene (PE) and have the popular two position design (up/loose for aerobic work and down/sealed for anaerobic cultures)
  • 12mm x 75mm tubes are graduated to 4ml
  • 17mm x 100mm tubes are graduated to 12ml
  • Printed graduations & marking spot
  • Sterile; RNase & DNase free
  • Culture Tubes are supplied with dual position caps attached

Have any questions about today’s featured product? Let us know in the comment box below.

Weekly Wrap For December 2 – December 6, 2013

Proper Handwashing Techniques & Tips

Proper handwashing is one of the most important steps we can take to avoid getting sick and spreading germs to other people. The first full week in December is National Handwashing Awareness Week. To help celebrate and help raise awareness of the importance of handwashing we will share some helpful tips and techniques to stay healthy. What is the right way to wash your hands? 

Benchmark Scientific – Mortexer Vortex Mixer With Multi-Head

This week [December 2, 2013 through December 6, 2013] we are offering a special Buy One, Get One Free“ promotion on our Mortexer™ Vortex Mixer with Multi-Head™ from Benchmark Scientific. When you buy one Mortexer™ Vortex Mixer [BV1005] at the regular price you will receive your second one free. The free unit will automatically be added to your cart with purchase.

What Are The Parts Of A Lead Eyeglass Frame?

Why are lead eyeglasses important? The risk for radiation induced eye injuries are particularly high for health professionals such as interventional cardiologists, interventional radiologists, doctors using fluoroscopy in operating theaters and paramedical personnel who remain close to the patient during the procedure.

Whiteboard Wednesday: What You Should Do After Using PPE Supplies

Today on Whiteboard Wednesday we discuss proper ways to dispose your PPE (personal protection equipment) supplies after use. Properly disposing your PPE supplies in your medical facility is very important for reducing the spread of infection. Be sure to watch our Whiteboard Wednesday video below!

The Different Types of Ultrasound Scans

There are several different types of ultrasound scans depending on the part of the body being examined. There are external, internal and endoscopic ultrasound scans. An external ultrasound involves the use of a an ultrasonic sensor also known as a transducer or transceiver which is placed on the patients skin and is moved over the body part being examined. An ultrasound gel is applied to the skin to improve the movement of the transducer and ensure continuous contact between the skin and the transducer. 

Benchmark Scientific – Mortexer Vortex Mixer With Multi-Head

The Mortexer™ is MORE than your standard vortex mixer. The unique design of the Multi-Head™ (included) features a traditional cup head for general purpose mixing plus holds up to eight microcentrifuge tubes. The drive system is balanced with Q-Drive™ technology, providing a smooth vortexing action, while minimizing noise and excessive vibration. This results in quieter, more efficient and longer lasting operation. Increased speed, up to 3400 rpm produces an instant vortex of even the largest sample sizes, including 50ml tubes.


Technical Data 
Speed Range200 to 3400 rpm
Operating ModesTouch or Continuous
Operating Temperature Range+4 to +65 degrees celsius
Dimensions13 x 16 x 17 cm
5 x 6.3 x 6.7 in.
Weight3.8 kg/ 8.4 lb
Electrical115V AC, 60 Hz, 1.5A
230V AC, 50Hz, 0.75A
230V AC, 60 Hz, 0.75A
Warranty2 years


Main Features 

  • Unique Multi-Head™ for general purpose vortexing PLUS holds up to eight microtubes (Patent Pending)
  • Powerful motor for INSTANT vortexing
  • Continuous or “touch” operation
  • Q-Drive™ dynamic balancing system
  • Variable speed from 200 to 3400 rpm
  • Wide variety of accessories


BV1000-FLATOptional 3 in. flat head attachment
BV1000-COMBOOptional combination head for one microplate & microtubes (38x1.5 & 28x0.5)
BV1000-H15Optional attachment, 12 x 1.5ml, horizontal
BV1000-H150Optional attachment for 4 x 15ml, horizontal
BV1000-H500Optional attachment for 2 x 50ml, horizontal


Other features include: “no-walk” suction feet, cold room/incubator compatibility and spill-proof electronic controls. The Mortexer™ Vortex Mixer with Multi-Head™ features a 2-year warranty. The Mortexer™ Vortex Mixer with Multi-Head™ and accessories are available on our main site.


Disposable UV-Transparent Spectrophotometer Cuvettes

Disposable UV-Transparent spectrophotometer cuvettes are an excellent alternative to fragile, expensive quartz cuvettes for DNA, RNA, and protein analyses between 220-900nm. For example, the disposable BRAND UV-Cuvettes are made from a proprietary polycyclical olefin which is resistant to many aggressive solvents and eliminates the need for tedious maintenance, cleaning, and most importantly the contamination risk associated with quartz cuvettes. Disposable spectrophotometry cuvettes eliminate the risk of cross-contamination from previous analysis which will cause inaccuracies, low sensitivity, and lack of precision. Over time quartz cuvettes can become cracked, chipped or scratched,  choosing a disposable cuvette you will allow you to save valuable time.

The BRAND disposable UV-Transparent Spectrophotometer cuvettes are available in three different sizes; ultra-micro, semi-micro, and macro which offer additional flexibility regarding sample volume (see table below for specifications).

UV-Transparent Spectrophotometry Cuvettes  
Filling Volume
Maximum 550μL (15mm window)3.0mL4.5mL
850μL (8.5mm window)--
Sample Window Dimensions2mm x 3.5mm (minimum)4.5mm x 23mm10mm x 35mm
Light Path10mm10mm10mm
Range of Application220-900nm220-900nm220-900nm

The ultra-micro cuvettes are available individually-wrapped and independently-certified DNA-, DNase-, and RNase-free for an extra degree of sample protection. The BRAND cuvettes have improved chemical resistance; including most polar organic solvents, as well as a broad range of acids and bases. Polystyrene and methacrylate cuvettes have a lower chemical resistance compared to the BRAND UV-Cuvettes which are compatible with chemicals such as acetone, butanone, DMF, and concentrated hydrochloric acid.

When choosing a cuvette, consistent and repeatable results are essential to any analysis. The BRAND UV-Cuvettes are manufactured from scratch-resistant materials, and are grouped by manufacturing mold cavity number to ensure the lowest variation in extinction coefficient. The BRAND UV-Cuvettes are compatible with most commercial spectrophotometers and photometers without the use of special adapters.

The benefits of disposable cuvettes have many advantages over quartz cuvettes. Quartz cuvettes are expensive and typically cost much more than disposable UV-Cuvettes. Disposable UV-Transparent cuvettes eliminate the risk of sample carryover and can enhance the reliability of analytical results. Traditional quartz cuvettes take approximately 5 minutes to wash and dry, using disposable UV-Transparent spectrophotometer cuvettes will eliminate the need for cleaning and reusing cuvettes which in turn will save time and money.

Our cuvettes are designed to fit all major spectrophotometers and photometers from all the top manufacturers. If you are concerned about unit compatibility, request a free sample to try out before you decide to buy.

Digital Dry Baths In Your Laboratory

Before we had digital dry baths, laboratories relied on analog dry baths to heat samples. Digital dry baths are often considered the next generation of dry baths and are essential in many applications that take place in the laboratory. Many have digital screens with easy-to-see temperature display for accurate readings. We’re breaking this post down with a few of our most common digital dry baths.

The MyBlock mini dry bath is a compact digital dry bath that can fit in the palm of your hand! This portable unit has exchangeable blocks, for tube sizes of 0.2 to 50ml. This mini dry bath has back-light display to control temperatures up to 80°C. Keeping a small profile, this unit includes a clear plastic cover allows for enhanced temperature regularity and ramping time.

Another style is the digital dry bath – four blocks, which also encompasses digital accuracy and convenience. This unit has the capacity for single, double and four blocks. This particular dry bath offers temperature and time control, which eliminates the need for an external thermometer or timer. The four block model can accommodate up to 96 x 1.5ml tubes in less than a square foot of bench space.

Digital dry baths incorporate a microchip into the unit which allows the temperature of the bath to be controlled through digital interface. The user can change the temperature by simply pressing the up and down arrows on the display panel. These digital dry baths are easy to use, easy to store and essential for laboratory settings. If you have any comments or questions regarding digital dry baths, please leave us a comment below!