Characterization of the central channel and its flow velocity distribution in an analytical inductively coupled plasma source. - Mao, Xiaobao; Su, Yongyang; Li, Zhiming; Han, Xin; Xu, Jiang; Wang, Wei; Xi, Ruiyang; Zhang, Pengfei; Lan, Xiaofei (JAAS (Journal of Analytical Atomic Spectrometry), 2026)