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铬作为将动物皮转变为革的重要鞣剂材料之一,在胶原纤维中的存在和分布情况对成品革的质量、性能等方面有着极大的影响。本文利用铬酸根易于与铅离子形成难溶盐沉淀的反应特性,提出了一种新的电境组织化学方法。在特定的pH值和温度下,用含有H_2O_2,Pb～(+2)的孵育介质处理铬鞣革的超薄切片:将皮革纤维中的三价铬Cr～(+3)先氧化为CrO_4～=,随之由铅离子捕获。从而实现铬离子在胶原纤维中的定位。透射电子显微镜的观察及电子探针x-射线微区分析结果证明该方法是十分有效的。
Chromium is one of the important tanning agents that convert animal skin into leather. The presence and distribution of collagen in the collagen fiber have a great impact on the quality and performance of the finished leather. In this paper, chromate is easily formed with lead ions precipitation difficult reaction of salt, proposed a new method of electrochemistry histochemistry. The ultrathin sections of chrome tanned leather were treated with incubation medium containing H 2 O 2 and Pb 2+ at specific pH value and temperature. The trivalent Cr 3+ in the leather fiber was first oxidized to CrO 4 ~ =, Followed by capture of lead ions. In order to achieve the positioning of chromium ions in collagen fibers. Transmission electron microscopy and electron probe x-ray microanalysis results show that the method is very effective.