<p><span data-huuid="15948257282639137678">ATR-FTIR is&nbsp;<mark class="QVRyCf">a widely used sampling technique for Fourier Transform Infrared spectroscopy that analyzes the infrared spectrum of samples without extensive preparation</mark>.&nbsp;</span><span data-huuid="15948257282639134799">ATR-FTIR works by using an infrared beam that is internally reflected at a crystal-sample interface, where it is then absorbed by the sample and attenuated.&nbsp;</span><span data-huuid="15948257282639136016">This technique is versatile and can be used for liquids, solids, and pastes, and has become the most common method for FTIR due to its ease of use and versatility.</span></p><br/><p class="MsoNormal" style="text-align: justify; line-height: normal;"><strong>Advantages of ATR-FTIR:</strong></p><br/><ul style="margin-top: 0in;" type="disc"><br/><li class="MsoNormal" style="text-align: justify; line-height: normal; mso-list: l1 level1 lfo1; tab-stops: list .5in;"><strong>Versatility:</strong>&nbsp;It can be used to analyze a wide range of sample types, including liquids, solids, powders, and pastes.&nbsp;</li><br/><li class="MsoNormal" style="text-align: justify; line-height: normal; mso-list: l1 level1 lfo1; tab-stops: list .5in;"><strong>Surface Analysis:</strong>&nbsp;ATR-FTIR is a surface-sensitive technique, which is useful for analyzing things like surface treatments on films or coatings.&nbsp;</li><br/><li class="MsoNormal" style="text-align: justify; line-height: normal; mso-list: l1 level1 lfo1; tab-stops: list .5in;"><strong>Reproducibility:</strong>&nbsp;The technique is known for providing highly reproducible results.&nbsp;</li><br/></ul><br/><ul style="margin-top: 0in;" type="disc"><br/><li class="MsoNormal" style="text-align: justify; mso-list: l0 level1 lfo1; tab-stops: list .5in;"><strong>Minimal Sample Preparation:</strong>&nbsp;Many samples can be analyzed directly without prior preparation, making it a fast and convenient technique.&nbsp;</li><br/></ul>