Abstract: Homogeneity, stability and certification of reference materials for masson pine(Pinus massoniana Lamb.)turpentine oil were carried out. The content of 4 indicating of components of the reference material was measured using gas chromatographic area normalization method. The standard of turpentine oil reference of masson pine passed the test of homogeneity, and it was stable during 36 months at least. The evaluation results of the reference by different labs show that the standard value of 4 indicating components contents were as follows: α-pinene content of 84.63% with standard uncertainty of 0.12%, extended uncertainty of 0.24% and confidence coefficient of 95%; β-pinene content of 9.56% with standard uncertainty of 0.07%, extended uncertainty of 0.14% and their confidence coefficient is 95%; limonene content is 1.66% with standard uncertainty of 0.03%, extended uncertainty of 0.06% and confidence coefficient of 95%; longifolene content is 0.43% with standard uncertainty of 0.04%, extended uncertainty of 0.08% and confidence coefficient of 95%, respectively.

Key words: turpentine oil of masson pine(Pinus massoniana Lamb.), reference materials, certification