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为了研究无机砷（Ａｓ）污染对血红素代谢的影响设计了本实验。对象：对中国内蒙古自治区某地长期饮用含高浓度砷的井水而中毒的患者３６人（男２３人，女１３人）测定患者尿中的砷及卟啉含量。以正常中国人１０人为对照组。方法：尿中砷含量用超低温捕集—还元氧化—原子吸收
This experiment was designed to investigate the effect of inorganic arsenic (As) contamination on heme metabolism. PARTICIPANTS: A total of 36 patients (23 males and 13 females) who were poisoned with well water containing high levels of arsenic over a long period of time in the Inner Mongolia Autonomous Region of China were assayed for urinary arsenic and porphyrin levels. 10 normal Chinese as a control group. Methods: Urinary arsenic levels were captured by ultra-low temperature - also by elemental oxidation - atomic absorption