A simple alternative colorimetric assay of chromium in accessories is proposed. A miniature part of a sample was dissolved by acid digestion. With dithiooxamide (DTO) complexes, metal interferences are retained in polyurethane foam synthesized in the lab, while chromium ions present in the eluate. A 100-μL volume of the eluate was measured for the absorbance using a handy spectrometer. The proposed method was successful for chromium assay and the results obtained agreed with the reference (FAAS) method. The amounts of chromium in accessories were found in the range of 100 to 390 mg g⁻¹.

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中文翻译：

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使用聚氨酯泡沫和比色技术进行缩小样品制备，用于配件中的铬测定。

提出了一种简单的替代比色法测定配件中的铬。通过酸消化溶解一小部分样品。使用二硫代草酰胺 (DTO) 络合物，金属干扰物保留在实验室合成的聚氨酯泡沫中，而铬离子则存在于洗脱液中。使用便携式光谱仪测量 100 μL 体积的洗脱液的吸光度。所提出的方法成功用于铬测定，并且获得的结果与参考（FAAS）方法一致。^{配件中的铬含量在 100 至 390 mg g -1}范围内。

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