pentosan

Fig. 4 Flow chart of pentosan analysis – Orcinol spectrophotometric method.

圖4：聚析法流程圖—間苯二甲酚光法。

Fig. 4 Flow chart of pentosan analysis - Orcinol spectrophotometric method.

图4:聚析法流程图—间苯二甲酚光法.

In different harvesting seasons, the lignin, holocellulose and pentosan contents in bamboos didn''t change too much.

于同为化学主要组成的木质素、全纤维素、聚成，则没有季节变化。

That means the birch from high longitude and latitude areas will have lower content of the ash, extraction and lignin, higher content of the holocellulose and pentosan in the wood.

这表明，选择较高经纬地区的白桦，可以降低灰、抽出物、木素含量，提高综纤维素和聚糖含量。