GB/T 32769-2016 in English

VALID

Identification atlas of African tropical timber species

Issued on:2016-06-14
Implemented on:2017-01-01
File Format:PDF
Delivery:Via email within 5 business days

Price(USD)： $690.00
$670.00

Standard No:	GB/T 32769-2016
Document status:	VALID
Title in English:	Identification atlas of African tropical timber species
Title in Chinese:	非洲热带木材树种鉴定图谱
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2016-06-14
Implemented on:	2017-01-01
ICS Classification:	79.080-Semi-manufactures of timber
Chinese Classification:	B69-Timber and processed timber
Professional Classification:	GB-National Standard
Related Topics:	GB/T 32769-2016 Statutory Atlas Africa species Rotagram phase identification hot wood tropical Wood Species Identification Tree Species Identification Wood Species Identification Timber Species Identification Timber species Several mass spectrometric identification techniques High-efficiency timber species african egg Rubber identification Primary Spectrum and Secondary Spectrum Africa One tropical wood Basis for Identification of Tree Species Two methods of mass spectrometric identification Primary Spectrum Secondary Spectrum Primary Spectrum Secondary Spectrum e identification GBT32769 GB/T 32769-2016 Enzyme identification flow chart XRD pattern and AAS pattern Layer composition identification Calorimeter identification

《GB/T 32769-2016非洲热带木材树种鉴定图谱》由TC41（全国木材标准化技术委员会）归口，TC41SC1（全国木材标准化技术委员会基础标准分会）执行，主管部门为国家林业和草原局。

Introduction

Analysis of the core content of the standard

Technical dimensions	Macroscopic characteristics	Microscopic characteristics	Typical tree species
Structural system	Difference between heartwood and sapwood, arrangement of pores, and type of axial parenchyma	Pit pattern, ray tissue type, and crystal distribution	Oak Olive/Afghanistan
Density parameters	Air-dry density range 0.33-1.27g/cm³		Cola bean wood(1.27g/cm³)

Key technical features

Key points for macroscopic identification

The standard specifies three types of pore arrangement: diffuse-porous wood (such as candle wood), ring-porous wood and semi-ring-porous wood (such as windmill wood). The axial parenchyma is divided into 8 forms, including wing-shaped and wing-shaped, among which two-stamen sappan wood presents a typical off-tube band feature.

Microscopic identification system

Establish three-level identification indicators: vessel characteristics (single/complex pore ratio), pit type (mainly alternate), ray tissue (heteromorphic type II is common). Special markers such as the rhombus crystals of Irochocarpa have identification value.

Recommendations for the implementation of the standard

1. Multi-dimensional verification: For easily confused tree species such as Guyi Sumu, it is necessary to combine the cross-section banded pattern and the chord section wave mark characteristics for cross-validation

2. Equipment configuration: It is recommended to equip with a 100-400x biological microscope and a 12x stereoscope to ensure the accuracy of microscopic structure observation

3. Specimen management: Establish a comparison database with reference to the benchmark samples of the 30 tree species in the standard

More samples: DL/T 5154-2012 JC/T 2453-2018 DL/T 368-2010

Sample only — not a preview of GB/T 32769-2016

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