Based on the results of this feasibility study, differential scanning calorimetry appears to be a promising technique for determining quartz in powdered samples. The method can avoid interferences, uses relatively inexpensive equipment compared to many of the more conventional techniques, and requires minimal operator skill. For samples containing quartz only, the method has good precision and sensitivity and exhibits a linear response for a wide range (20-10 000 mug) of quartz contents. Although as little as 20 mug of quartz could be detected, the lower limit of detection was not determined. Also, estimates of accuracy and precision for quartz in sample mixtures are still needed. It is likely that optimization of instrumental and sample mounting parameters will result in improved peak response, detection limits, and precision.