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天然水中微量铁经活性炭富集后可用比色法测定。该法对样品７次平行测定的相对标准差为５．３％，加标回收率为９２．９％～１０８％。该法简便快速，不需复杂设备，特别适于基层实验室推广应用。
Trace amounts of trace iron in natural water can be determined by colorimetry after enrichment with activated carbon. The relative standard deviation of the method for seven parallel determinations was 5.3% and the spiked recoveries ranged from 92.9% to 108%. The method is simple and fast, without complex equipment, especially suitable for the promotion and application of grass-roots laboratories.