GB/T 5497-1985 PDF English
US$115.00 · In stock · Download in 9 secondsGB/T 5497-1985: Inspection of grain and oilseeds. Methods for determination of moisture content Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Obsolete
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 5497-1985 | English | 115 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Inspection of grain and oilseeds. Methods for determination of moisture content
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 5497-1985
GB/T 5497-1985: Inspection of grain and oilseeds. Methods for determination of moisture content---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT5497-1985
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC (633.1+633.85)
001.4
GB/T 5497-85
Inspection of Grain and Oilseeds – Methods for
Determination of Moisture Content
Issued on: NOVEMBER 02, 1985
Implemented on: JULY 01, 1986
Issued by. Standardization Administration of the People’s Republic of China
Table of Contents
1 Constant-Weight Method at 105°C... 3
2 Baking Method at Fixed Temperature and Time... 5
3 Tunnel Oven Method... 6
4 Double Baking Method... 7
Additional Information... 8
Inspection of Grain and Oilseeds – Methods for
Determination of Moisture Content
This Standard applies to the determination of the moisture content of commodity grains and
oilseeds.
1 Constant-Weight Method at 105°C
1.1 Instruments and utensils
1.1.1 Electric thermostat box;
1.1.2 Analytical balance. 0.001g;
1.1.3 Electric grinder or hand grinder for laboratory use;
1.1.4 Grain screening;
1.1.5 A desiccator equipped with color-changing silica gel (the color-changing silica gel cannot
be used once it turns red, and it shall be dried at 130°C ~140°C until it turns blue before use).
1.1.6 Aluminum box. inner diameter 4.5cm, height 2.0cm.
1.2 Preparation of specimen
Take a certain sample from the average sample; and prepare the specimen according to the
method specified in the table below.
W1 – weight of specimen and aluminum box before baking, in g;
W2 – weight of specimen and aluminum box after baking, in g.
When the moisture content of oilseed with shell is determined according to seed and shell
respectively, the moisture content of oilseed with shell shall be calculated according to Formula
(2).
Where.
M1 – moisture percentage of seed, in %;
M2 – moisture percentage of shell, in %;
A – percentage of total seed that can be obtained, in %.
The allowable difference of the double test results shall be no more than 0.2%; calculate the
average value, which is the measurement result. The measurement result retains the first digit
after the decimal point.
When other methods are used to measure the water content, the result compared with this
method shall not exceed 0.5%.
2 Baking Method at Fixed Temperature and Time
2.1 Instruments and utensils. The same as 1.1.
2.2 Preparation of specimen. The same as 1.2.
2.3 Calculation of the amount of specimen. This method uses quantitative specimens. First
calculate the area of the bottom of the aluminum box; and then calculate the amount of the
specimen as 0.126g per square centimeter (bottom area × 0.126). For example, if an aluminum
box with a diameter of 4.5cm is used, the sample amount is 2 g; and if an aluminum box with
a diameter of 5.5cm is used, the sample amount is 3 g.
2.4 Operation method
Weigh the quantitative specimen (accurate to 0.001g) by the aluminum box that has been baked
to constant weight; and when the temperature of the oven rises to 135~145°C, put the aluminum
box containing the specimen on the roast net around the thermometer in the oven; within 5 min,
adjust the oven temperature to 130 ± 2°C; start timing; take it out after 40 min of baking; put it
in a desiccator to cool off, and weigh it.
Moisture content
2.5 Calculation of results
The calculation of moisture content by the method at fixed temperature and time shall be the
same as 1.4.
3 Tunnel Oven Method
The tunnel oven method is used to determine the moisture content of cereal grains to bake at
160±2°C for 20 min. For the determination of the moisture content of oilseeds and beans, it is
used to bake at 130±2°C for 30 min.
3.1 Instruments and utensils
3.1.1 Tunnel oven;
3.1.2 Stopwatch.
3.2 Preparation of specimen. The same as 1.2.
3.3 Operation method
3.3.1 Fix temperature. Lay the instrument flat; insert the thermometer into the baking chamber
so that the mercury ball is about 1 cm away from the opening of the baking box; and then turn
on the power supply to fix the temperature.
3.3.2 Weighing oven boxes. Push three clean oven boxes into the baking chamber; and push
another one after 10 min. At this time, one of the oven boxes pushed first is pushed out of the
tunnel; and it is placed on the weighing pan over the oven. Add 10 g of counterpoise; and adjust
the screws on the paperscale so that the pointer points to the zero point of the gauge. Take off
the counter poise and put the prepared specimen into the baking box; increase or decrease the
specimen until the pointer stops at zero. Then distribute the weighed specimens evenly in the
baking box; push them into the baking chamber; close the left door; and time at the same time.
3.3.3 Baking the specimen. When using the method of baking at 160°C for 20 min, push a
baking box containing the specimen into the baking chamber every 6 min 40 s. When using the
method of baking at 130°C for 30 min, push a baking box containing the specimen into the
baking chamber every 10min. When the fourth specimen box is pushed in, the baking time of
the first sample box is up; and it is pushed out onto the weighing pan; pull down the fixed
support rod of the balance pointer; and observe the value pointed by the pointer, which is the
measured moisture percentage.
The allowable difference between the double test results is no more than 0.5%.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 5497-1985 be delivered?Answer: The full copy PDF of English version of GB/T 5497-1985 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 5497-1985_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 5497-1985_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 5497-1985 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. How to buy and download a true PDF of English version of GB/T 5497-1985?A step-by-step guide to download PDF of GB/T 5497-1985_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 5497-1985".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|