Page 1 of 1
AOCS Official Method Ac 2-41
Reapproved 2009
Moisture and Volatile Matter
DEFINITION
This method determines the moisture and any material that is volatile under the conditions of the test.
SCOPE
Applicable to soybeans.
SAMPLING AND ANALYSIS OF VEGETABLE OIL SOURCE MATERIALS
APPARATUS
1. Forced-draft oven—AOCS Specification H 1-39.
2. Aluminum moisture dishes—minimum 30 gauge, approximately 50 × 20 mm with tight-fitting slip-over covers; Sargent-
Welch (20 mL WLS 25725-B, 50 mL WLS 25725-D), or equivalent (see Notes, 1).
3. Desiccator—containing an efficient desiccant. Calcium chloride is not satisfactory. See AOCS Specification H 9-87 for
alternatives.
4. Boerner sampler or divider—36-pocket size (see Notes, 1).
5. Sieve—20-gauge metal, with round hole perforations 0.32 cm in diameter (see Notes, 2).
6. Airtight sample containers of convenient size.
PREPARATION OF TEST SAMPLE
1. Spread the laboratory sample out on the sieve, shake and remove by hand picking all foreign matter that does not go through
the sieve.
2. Reduce the cleaned laboratory sample through the Boerner sampler to 113–227 g. Preserve this test sample in airtight
containers and use for all subsequent analyses.
PROCEDURE
1. Weigh 10 g of the whole beans into a tared moisture dish.
2. Dry in the forced-draft oven at 130 ± 3°C for 3 hr. Remove from the oven, cover immediately, cool in a desiccator to room
temperature and weigh.
CALCULATIONS
1. Moisture and volatile matter, % =
loss in mass, g
mass of test portion, g
100×
NOTES
1. For test samples with high moisture and volatile content, the use of lightweight, coverless, disposable weighing dishes may
give erroneously high results due to test portion loss from splattering during heating.
2. Equipment available from the Seedburo Equipment Co., Chicago, IL, USA.
本文档为【AOCS Official Method Ac 2-41(2009)】，请使用软件OFFICE或WPS软件打开。作品中的文字与图均可以修改和编辑，
图片更改请在作品中右键图片并更换，文字修改请直接点击文字进行修改，也可以新增和删除文档中的内容。
该文档来自用户分享，如有侵权行为请发邮件ishare@vip.sina.com联系网站客服，我们会及时删除。
[版权声明] 本站所有资料为用户分享产生，若发现您的权利被侵害，请联系客服邮件isharekefu@iask.cn，我们尽快处理。
本作品所展示的图片、画像、字体、音乐的版权可能需版权方额外授权，请谨慎使用。
网站提供的党政主题相关内容(国旗、国徽、党徽..)目的在于配合国家政策宣传，仅限个人学习分享使用，禁止用于任何广告和商用目的。
浙公网安备 33021202002483