Analyzing Samples 
Agilent Cary 630 FTIR Spectrometer User’s Guide  23 
 
3.  Analyzing Samples 
Interchanging Sampling Accessories  24 
Diamond ATR Sampling Accessory  26 
ZnSe ATR Sampling Accessory  30 
Germanium ATR Sampling Accessory  34 
5 Bounce Zinc Selenide ATR Sampling Accessory  38 
Transmission Sampling Accessory  40 
10 and 45 Degree Specular Reflectance Sampling 
Accessories 42 
TumblIR Sampling Accessory  45 
DialPath Sampling Accessory  48 
Diffuse Reflectance Sampling Accessory  53 
The Agilent Cary 630 FTIR spectrometer requires a sampling 
accessory in order to present the sample to the infrared beam. You 
will have selected one or more sampling accessories when you ordered 
your Cary 630 FTIR. Additional sampling accessories can be 
purchased at a later date if your sampling needs change.  
The basic steps for analyzing a sample with all sampling accessories 
are: 
1   Clean the sample interface. 
2  Collect a background spectrum. 
3  Collect a sample spectrum.