The paper indicated that dilution rate, acidity and salinity had a great influence on the determination of sulphate in water samples.Optimum condition could make the result more stable and believable.

• 摘要用铬酸钡间接原子吸收法测定水中的硫酸盐，发现稀释倍数、欲度、酸度等对其影响特别大，通过试验比较，总结出应对措施，解决了测定结果的稳定度和可靠性。