July 2, 2022
How to Place Cuvette in Spectrophotometer

Using the spectrophotometer can be tricky, especially if you are using it for the first time and have not had any experience with such instruments. One of the most frequent questions our support team gets concerns how to place the cuvette in spectrophotometer and how to use a cuvette in a spectrophotometer. In this article, we will try to help you with both topics, hopefully without having to contact our customer support directly!

Compose the Equipment

All spectrophotometers come with instructions for setup, but each brand is slightly different. However, most require you to locate a place inside your machine where you can mount your cuvette holder or place it on a flat surface. The place where you insert and remove your cuvette is called an accessory port, which means it might be on top of or underneath your instrument’s lid. To ensure that you have found it, shine a flashlight inside and watch as light bounces off reflectors into the opening. If the light beams back at you without obstruction, then you’ve found it! If not, check other places around that area and continue looking until there’s no more space left for errors.

Turn on the UV-VIS Spectrophotometer

Turn on your spectrophotometer. Locate where you store your cuvettes and verify that you have one available for use. Most spectrophotometers require a 1-5mL cuvette with a PTFE or similar sleeve at both ends. Place it onto the stage of your spectrophotometer, making sure that there is no air between it and the coverslip/sample holder already on stage. The UV-VIS sample holder should have an opening around 3-5mm, depending on your specific model. If you are unsure how to place cuvette in spectrophotometer, consult with someone who is more familiar with its use.

Prepare the Cuvette

A cuvette is an optical device used for quantifying light transmitted through a particular substance. To begin using a spectrophotometer, you must be able to properly place your cuvettes into it. Follow these steps: First, secure your cuvettes with two metal clamps that are included with your spectrophotometer. Next, adjust your measurement settings based on how much liquid will be inside of each cuvette. When all of these steps have been completed, you’re ready to start measuring light transmittance! This can typically take anywhere from five minutes up to half an hour depending on how many samples you’re testing.

Get a Good Position of the Wavelength

Make sure that you put your sample into a cuvette. A cuvette is a sample holder used for measuring and detecting electromagnetic radiation. There are several types of cuvettes with varying shapes and sizes, but they all have one thing in common: they hold samples used for spectroscopy or colorimetry experiments. All you need to do is place your sample into a cuvette. To ensure accuracy, make sure that it’s properly loaded into a cuvette before proceeding with your experiment.

Put the Sample into the Cuvette

When using a spectrophotometer, one of your first steps will be to insert your sample into a cuvette. If you’re new to spectroscopy, there are several different cuvettes for different applications. The difference lies in how much light can be allowed through and also what wavelengths of light should be blocked out. Some cuvettes have filters that help with these things, while others are constructed so that as little light is allowed as possible. In all cases, you’ll need something transparent—glass or plastic—for your sample to go into so it can pass through into the machine. Make sure you insert your cuvette into spectrometer properly so you get correct measurement results.

Record the Reading

If you are new at measuring absorbance, chances are that you have a cuvette but no idea how to place it into your spectrophotometer. In order to properly use your instrument, be sure that you read through your manual and familiarize yourself with any specifics. Then, after doing so, follow these simple steps: open up a software program (e.g., Microsoft Excel) on your computer; go ahead and place a drop of water inside of one cuvette; then fill another cuvette with one of your standards; press record on the program and insert each cuvette into either channel A or B (depending on what your manual instructs). After inserting both standard and blank in different wells, wait at least 5 minutes before taking an absorbance reading.


In conclusion, we found that placing cuvettes is simple. Cotslab company created a video and instructions on how to use spectrophotometers. In order to test samples accurately, you must place cuvettes correctly. We recommend consulting your manual or contacting our support team for more information. Placing cuvettes may seem challenging but with proper instructions, it’s an easy process that can be completed quickly!

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