激光水稳定性同位素分析仪测定矿泉水中的δ~2H、δ^(18)O和δ^(17)O

Determination of δ~2H,δ^(18)O and δ^(17)O in mineral water by laser water stable isotopes analyzer

通过多次测定标准样品,统计分析得出,LWA-45EP型激光水稳定性同位素分析仪具有很好的准确性和精密度,标准样品的δ~2H、δ^(18)O和δ^(17)O的测量值与真值之间达到极显著相关,R>0.9999,测量精度为0.17‰(δ~2H)、0.06‰(δ^(18)O)、0.05‰(δ^(17)O)。采用该仪器对16种饮用矿泉水进行测定,结果表明水中氢氧同位素组成具有明显的时空差异。

The results showed that the laser water stable isotope analyzer（LWA-45EP）had good accuracy and precision.The standard samples ofδ2,Hδ18 O andδ17 O had significant correlation between the measured value and the true value,R〉0.9999.The measurement precision was 0.17‰（δ2 H）,0.06‰（δ18 O）and 0.05 ‰（δ17 O）.The determination of 16 kinds of drinking mineral water showed that the hydrogen and oxygen isotopic composition had obvious differences of space and time.