GB/T 16258-2018 English PDF

US$119.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 16258-2018: Test method for sugar in cotton fibers -- Spectrophotometry
Status: Valid

GB/T 16258: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 16258-2018	119	Add to Cart	3 days	Test method for sugar in cotton fibers -- Spectrophotometry	Valid
GB/T 16258-2008	239	Add to Cart	2 days	Cotton fibers -- Test method for sugar content -- Quantitative method	Obsolete
GB/T 16258-1996	279	Add to Cart	3 days	Test method for sugar in cotton fibers--Quantitative method	Obsolete

Similar standards

GB/T 6097   GB/T 21977   FZ/T 01085   GB/T 45583   GB/T 31902   

Basic data

Standard ID: GB/T 16258-2018 (GB/T16258-2018)
Description (Translated English): Test method for sugar in cotton fibers -- Spectrophotometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: W10
Classification of International Standard: 59.060
Word Count Estimation: 6,618
Date of Issue: 2018-02-06
Date of Implementation: 2018-09-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 16258-2018: Test method for sugar in cotton fibers -- Spectrophotometry

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Test method for sugar in cotton fibers-Spectrophotometry ICS 59.060 W10 National Standards of People's Republic of China Replacing GB/T 16258-2008 Cotton fiber containing sugar test method spectrophotometric method (ISO 18068.2014, MOD) Published on.2018-02-06 2018-09-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 16258-2008 "Method for Quantitative Test of Cotton Fiber Containing Sugar". The main technical changes are as follows. --- Modification of the contents of Chapter 2 "Normative References"; ---Replaced the reagents in Chapter 6, changed "fatty acid alkanolamides" to "fatty alcohol polyoxyethylene ethers," and increased fatty alcohol polyoxygenation Ethylene ether solution notes; --- The contents of Chapter 7 "Preparation of Samples" were revised; --- In Chapter 8, "8.1 Blank Test," replace "Stay 5 minutes" with "Stay for 30 minutes." --- Changes to Chapter 8 "8.2.3 Working Curve Drawing"; --- Delete the "8.4 test of the actual moisture regain of raw cotton" and directly use the humidity adjustment method to take the cotton sample; --- Added an explanation of correcting absorbance to Chapter 9 "9.1 Calculation Formula" and modified some of the contents; --- Change the expression of "absorbance" in the standard to "absorbance"; --- Delete "10 precision" and add "10 test report". This standard uses the redrafted method to amend the ISO 18068.2014 "Quantity Method for Cotton Fiber Sugar Test Method". This standard and The main technical differences of ISO 18068.2014 are as follows. --- With regard to normative references, this standard has made adjustments to specific technical differences in order to adapt to China's technical conditions and adjustments. The focus is reflected in Chapter 2, “Normative References,” and the specific adjustments are as follows. ● Replaced ISO 139 with GB/T 6529 modified to adopt international standards; ● Replaced ISO 3696 with GB/T 6682 modified to adopt international standards; ● Use national standard GB/T 6097 instead of ISO 1130.1975; ● Removed ISO 4793.1980; ● Added GB/T 8170; --- Change the 6.4 fatty acid alkanolamides in ISO 18068.2014 to "fatty alcohol polyoxyethylene ethers"; --- Remove "6.6.2 Fatty acid alkanolamide (0.4g/L)" from ISO 18068.2014, refer to "6.6.3 Fatty Acid Alkanolamides (0.05g/L)" changed to "6.6.2 fatty alcohol polyoxyethylene ether (0.005%) solution"; --- Modify the quality of the laboratory sample of sample preparation in ISO 18068.2014 to not less than 150g; --- Modify "0.4 g/L fatty acid alkanolamide" in the blank test of ISO 18068.2014 8.1 to "0.005% fatty alcohol polyoxygenation Vinyl ether; --- Change the standing time after 8.8.1 coloring in ISO 18068.2014 from "5min" to "30min"; --- In Chapter 9 of this standard, the calculation formula for the absorbance of the calibration sample has been added. For ease of use, this standard has made the following editorial changes. --- Delete the warning in ISO 18068.2014; --- Modify the expression of 5.1 spectrophotometer in ISO 18068.2014, and combine 5.13 cuvette specifications; --- Combining the electronic balances of 5.2 specifications in ISO 18068.2014 into one electronic balance that can meet the test requirements; --- Replace the constant temperature water bath oscillator of ISO 18068.2014 5.3 constant temperature water tank and 5.12 mechanical oscillator; --- Remove 5.8 beaker specifications from ISO 18068.2014; --- Adjust 5.9, 5.10, and 5.11 in ISO 18068.2014 to 5.8, 5.9, and 5.10; --- Delete b) and e) from ISO 18068.2014 10 Test Report. This standard is proposed and managed by the China Fiber Inspection Bureau. This standard was drafted by. Hubei Provincial Fiber Inspection Bureau, Sichuan Entry-Exit Inspection and Quarantine Bureau, and Shandong Provincial Fiber Inspection Bureau. The main drafters of this standard are. He Li, Song Congshan, Chen Chunmei, Liu Hanmei, Yan Yonghui, Yu Lingyun, and Lu Xiaodong. The previous versions of the standard replaced by this standard are. --- GB/T 16258-1996, GB/T 16258-2008. Cotton fiber containing sugar test method spectrophotometric method

1 Scope

This standard stipulates the use of 3,5-dihydroxytoluene-sulfuric acid solution as a coloring agent and quantitative measurement of the total content of cotton fiber surface using a spectrophotometer. Determination of sugar. This standard applies to raw cotton, sliver, laps and other cotton fibers.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 6097 Cotton Fiber Test Sampling Method GB/T 6529 Standard Atmosphere for Humidification and Testing of Textiles (GB/T 6529-2008, ISO 139.2005, MOD) GB/T 6682 Analytical Laboratory Water Specifications and Test Methods (GB/T 6682-2008, ISO 3696.1987, MOD) GB/T 8170 Representation and Determination of Numerical Rounding Rules and Limit Values

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Sugar content percentageofsugar The percentage of total cotton sugar (including reducing sugar, non-reducing sugar) attached to the surface of cotton fiber is the weight of cotton fiber sample.

4 Principle

Under the action of non-ionic surfactants, sugars attached to the surface of cotton fibers are dissolved in extraction reagents and sugars are converted into strong acidic media. For the aldehydes, a color reaction occurs with 3,5-dihydroxytoluene to generate orange-yellow compounds. Spectrophotometer at the wavelength λ = 425nm Quasi-work curve is more quantitative.

5 Instruments and apparatus

5.1 Spectrophotometer (wavelength λ = 425nm); 1cm glass cell. 5.2 Electronic balance. Range ≥ 100g, division value 0.001g. 5.3 Constant temperature water bath oscillator. (70 ± 2) °C; reciprocating rate of at least 60 times/min, rotary rate of at least 30 weeks/min. 5.4 250mL ground stoppered Erlenmeyer flask or 250mL iodine flask. 5.5 pipette. 1mL, 2mL, 5mL; or pipette. 1000μL ~ 5000μL. 5.6 volumetric flask. 50mL, 100mL. 5.7 Measuring cylinder. 100 mL, 1000 mL. 5.8 25mL colorimetric tube and tube rack. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 16258-2018_English be delivered?

Answer: Upon your order, we will start to translate GB/T 16258-2018_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 16258-2018_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 16258-2018_English will be deemed to be sold to your employer/organization who actually pays 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+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 16258-2018?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 16258-2018 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.