An automated sample preparation for determination of total siloxanes in hair care products

This article reports an automated sample preparation for determination of total siloxanes in shampoo products using an inductively coupled plasma (ICP). A fully automated robotics system requires only setting blank sample tubes on the racks and putting products into these tubes manually. Robot preparation gives us higher efficiency in extraction and lower RSD than current manual preparation.

The analytical data sets demonstrate accuracy, precision, and reproducibility of the sample preparation. Linearity, accuracy, and precision ensure the validity of the robotics method. The method has a linearity working range from 0 to 500 ppm (correlation coefficient, R = 0.9999). The method gives the sufficient recoveries, R = 101 ± 1%. Relative standard deviation (RSD) is 0.42%. © 1999 John Wiley & Sons, Inc. Lab Robotics and Automation 11: 25–28, 1999