Towards a Non-Biased Formaldehyde Quantification in Leather: New Derivatization Conditions before HPLC Analysis of 2,4-Dinitrophenylhydrazine Derivatives

皮革中甲醛定量分析的无偏方法：2,4-二硝基苯肼衍生物高效液相色谱分析前的新衍生化条件