Abstract Single quadrupole inductively coupled plasma-mass spectrometry (ICP-QMS) method was developed to measure the total F concentration (fluoride and covalently bonded F) in tea infusion and its associated health risks was assessed. The detection was based on the measurement of BaF+ generated by F and Ba in ICP. Polyatomic interference from 138Ba- hydroxide and 157Gd+ at the target m/z 157 were overcome by combining of aerosol dilution technique and mathematical correction. The limit of detection was 0.032 µg L−1. After 5 min of leaching, the mean F concentration in 100 tea infusion ranged from 0.24 to 7.25 mg L−1 (brick tea > black tea > white tea > oolong tea > green tea). 95th percentile of the chronic daily intake (0.003–0.024 mg/kg/day) and the target hazard quotient (0.089–0.398) indicate that F exposure from tea consumption in adults is within the safe level.

中文翻译：

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单四极杆电感耦合等离子体质谱法测定茶浸液中的氟及其健康风险

摘要 开发了单四极杆电感耦合等离子体质谱 (ICP-QMS) 方法来测量茶浸液中的总氟浓度（氟化物和共价键合的 F），并评估其相关的健康风险。该检测基于 ICP 中 F 和 Ba 产生的 BaF+ 的测量。通过将气溶胶稀释技术和数学校正相结合，克服了 138Ba-氢氧化物和 157Gd+ 在目标 m/z 157 处的多原子干扰。检测限为 0.032 µg L-1。浸出 5 分钟后，100 杯茶的平均 F 浓度范围为 0.24 至 7.25 mg L−1（砖茶 > 红茶 > 白茶 > 乌龙茶 > 绿茶）。慢性每日摄入量 (0.003–0.024 mg/kg/天) 和目标危害商数 (0.089–0.