Bhattacharyya S N, Kundu K P
Nuclear Chemistry Division Saha Institute of Nuclear Physics 92, Acharya Prafulla Chandra Road Calcutta-9, India.
Talanta. 1971 Apr;18(4):446-9. doi: 10.1016/0039-9140(71)80066-8.
Both iron(III) and its EDTA complex in 0-1N H(2)SO(4) medium absorb in the ultraviolet region of the spectrum, with absorption maxima at 305 and 258 nm respectively. EDTA can thus be determined by addition of excess of Fe(III) and measurement of the absorbance at the two wavelengths. An EDTA concentration as low as 10(-6)M can be determined with a fair degree of accuracy. The method is free from interferences from most common metal ions, and is simple and rapid.
在0-1N硫酸介质中，铁（III）及其EDTA络合物均在光谱的紫外区域有吸收，吸收最大值分别在305和258纳米处。因此，通过加入过量的铁（III）并测量两个波长处的吸光度，可以测定EDTA。低至10^(-6)M的EDTA浓度可以相当准确地测定。该方法不受大多数常见金属离子的干扰，且简单快速。
