GB/T 14698-2017 in English

SUPERSEDED

Identification method of feed material by microscopy

Issued on:2017-09-07
Implemented on:2018-04-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $130.00
$127.00

Standard No:	GB/T 14698-2017
Document status:	SUPERSEDED
Superseded by:	GB/T 14698-2017/XG1-2019 Identification method of feed material by microscopy, includes Amendment 1
Superseded on:	2019-06-04
Title in English:	Identification method of feed material by microscopy
Title in Chinese:	饲料原料显微镜检查方法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-09-07
Implemented on:	2018-04-01
Superseding:	GB/T 14698-2002 method of feed microscopy
ICS Classification:	65.120-Animal feeding stuffs
Professional Classification:	GB-National Standard
Related Keywords:	feed ingredients test items method requirements identification method standard feed identification test treatment method
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《GB/T 14698-2017饲料原料显微镜检查方法》由TC76（全国饲料工业标准化技术委员会）归口，主管部门为国家标准化管理委员会。

Introduction

Interpretation of GB/T14698—2017 Standard for Microscopic Examination of Feed Ingredients

Test items	Method requirements	Technical points
Sample preparation	Including sampling, pretreatment and sample dispersion	Standard sieves are required for grading. If necessary, petroleum ether degreasing or acetone dissolution is used
Microscopic examination	Combination of stereo microscope and biological microscope	The magnification range is 7~500 times, suitable for the observation of samples of different particle sizes
Identification test	Including chemical reaction tests such as triketone test and iodine test	Determine the type of ingredients through reagent reaction, such as starch, protein, minerals, etc.

1. Comparison and analysis of standard framework

GB/T14698—2017Compared with GB/T14698—2002, the main changes include:

Deleted the relevant clauses of compound feed
Added the petroleum ether defatting treatment method (7.2.3)
Optimized the standard text structure to make it clearer and easier to understand

2. Implementation suggestions and precautions

To ensure the accuracy of the test results, attention should be paid to the following in actual operation

Comparison sample management:Establish a comparison sample library of standard feed raw materials and adulterants and update it regularly.
Abnormal situation handling:If a large number of foreign matter or suspicious ingredients are found, chemical identification tests should be carried out immediately.
Quality control:Standardize the reagent preparation process to ensure that the instrument calibration cycle meets the requirements.

More samples: DL/T 368-2010 DL/T 5154-2012 YD/T 3934-2021

Sample only — not a preview of GB/T 14698-2017

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