Analyzing that sample, they identified specific changes in the paint's chromiumcompounds.
再分析这个样本，他们确定了油画颜料的铬化合物的具体变化。
2
Hexaalent chromiumcompounds are often used in electroplating leather tanning and textile manufacturing and hae been found in some drinking water sources.
六价铬化合物常用于电镀，制革及纺织制造，还存在于一些饮用水水源中。
3
Various methods for removing contaminants, such as chromium, sulfide, suspension, organic compounds and inorganic salts, from waste water in the leather industry are introduced.