Standard No.:	GB/T 22427.4-2008
English Name:	Starch - Determination of spot
Chinese Name:	淀粉斑点测定
Chinese Classification:	X11    Grain processing and products
Professional Classification:	GB    National Standard
ICS Classification:	67.180.20 67.180.20    Starch and derived products 67.180.20
Issued by:	AQSIQ; SAC
Issued on:	2008-10-19
Implemented on:	2009-3-1
Status:	valid
Superseding:	GB/T 12095-1989 Method for determination of spot of starch
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	80.0
Delivery:	via email in 1 business day

Starch - Determination of spot 1 Scope This standard specifies the method of measuring starch spots by naked eye observation. This standard is applicable to dried powdered starch and modified starch. 2 Term and definition For the purposes of this standard, the following term and definition apply: 2.1 spot mixed color spot observed with naked eyes under specified conditions 3 Principle Read the number of spots by observing the sample with naked eyes. 4 Apparatus 4.1 Transparent plate: colorless transparent plate engraved with 10 square grids (1 cm × 1 cm). It shall be clean and contamination-free. 4.2 Flat plate: it shall be white, clean, and free of contamination to distribute the sample evenly. 5 Operating procedures 5.1 Sample pretreatment Samples shall be well mixed. 5.2 Test portion Weigh 10 g of sample (5.1) and distribute it evenly on the flat plate (4.2). 5.3 Counting Cover the transparent plate (4.1) over the evenly distributed sample and gently flatten it. Under better light, with the distance between the eye and the transparent plate maintained at 30 cm, the spots in the samples shall be observed with the naked eye and counted,

Foreword i 1 Scope 2 Term and definition 3 Principle 4 Apparatus 5 Operating procedures 6 Calculation of result 7 Test report