diameter of less than 3 mm at the origin. The purge gas must be introduced ..... deviation, RSD), linearity through the origin can be assumed and the ..... the origin. The purge gas must be introduced no more than 5 mm from the base ..... , RSD), linearity through the origin can be assumed and the average ratio or ..... diameter of less than 3 mm at the origin. The purge gas must be introduced no