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GB/T 23761-2020 English PDF

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Q: Should I purchase the latest version GB/T 23761-2020?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 23761-2020 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.

US$259.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 23761-2020: Test method for air-purification performances of photocatalytic materials - Degradation of acetaldehyde (or formaldehyde)
Status: Valid

GB/T 23761: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23761-2020	259	Add to Cart	3 days	Test method for air-purification performances of photocatalytic materials - Degradation of acetaldehyde (or formaldehyde)	Valid
GB/T 23761-2009	479	Add to Cart	3 days	Photocatalytic air purification materials performance test methods	Obsolete

Similar standards

GB/T 23940 GB/T 23834.1 GB/T 23769 GB/T 23762 GB/T 23764

Basic data

Standard ID: GB/T 23761-2020 (GB/T23761-2020)
Description (Translated English): Test method for air-purification performances of photocatalytic materials - Degradation of acetaldehyde (or formaldehyde)
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G10
Classification of International Standard: 71.060.01
Word Count Estimation: 14,119
Date of Issue: 2020-03-06
Date of Implementation: 2021-02-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 23761-2020: Test method for air-purification performances of photocatalytic materials - Degradation of acetaldehyde (or formaldehyde)

---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 air-purification performances of photocatalytic materials--Degradation of acetaldehyde (or formaldehyde) ICS 71.060.01 G10 National Standards of People's Republic of China Replaces GB/T 23761-2009 Test method for air purification performance of photocatalytic materials and products Degradation of acetaldehyde (or formaldehyde) 2020-03-06 release 2021-02-01 implementation State Administration of Market Supervision Published by the National Standardization Administration

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 23761-2009 "Test methods for the performance of photocatalytic air purification materials". This standard is in accordance with GB/T 23761- Compared with.2009, the main technical changes in addition to editorial changes are as follows. --- Deleted the term "photocatalyst" (see 2.1 of the.2009 edition); --- Added the term "zero-level air" (see 3.2); --- Revised the statement of principle (see Chapter 4, Chapter 3 of the.2009 edition); --- Modified reagents or materials (see 5.2, 4.2 of the.2009 edition); --- Modified the supply of reaction gas (see 6.1.2, 5.1.1 of the.2009 version); --- Modified the diagram of the reaction test device of Figure 1 (see Figure 1, Figure 1 of the.2009 edition); --- Increased cross-sectional view of the photocatalytic reactor (see Figure 2); --- Modified the structure of the adjustment block in the photocatalytic reactor (see 6.1.3, 5.1.2 of the.2009 version); --- Modified the parameters of UV light source and visible light source (see 6.1.4, 5.1.3 of.2009 version); --- Modified the preparation of test samples (see Chapter 7, 5.3 of the.2009 edition); --- Modified the conditions for sample pretreatment (see 8.1, 6.2 of the.2009 version); --- Modified the requirements for ambient temperature (see 8.2.1, 6.3.2 of the.2009 version); --- Modified the initial concentration of acetaldehyde in the reaction gas (see 8.2.2, 6.3.1 of the.2009 edition); --- Added visible light test steps (see 8.2.3); --- Modified the concentration of acetaldehyde in the reaction gas for performance stability determination (see 8.5, 6.6 of the.2009 edition); --- Removed testing of samples with low photocatalytic removal rate (see 6.7 of the.2009 edition); --- Modified the calculation formula of performance stability [see formula (5), formula (4) of.2009 version]; --- Modified the calculation formula of acetaldehyde mineralization rate [see formula (9), formula (7) of.2009 version]; --- Added the calculation formula of the photocatalytic removal rate of formaldehyde [see formula (10)]. This standard was proposed by the China Petroleum and Chemical Industry Federation. This standard is under the jurisdiction of the National Chemical Standardization Technical Committee (SAC/TC63). This standard was drafted. Jiangsu Langyi Environmental Protection Technology Co., Ltd., Institute of Physical and Chemical Technology, Chinese Academy of Sciences, Fuzhou University, Suzhou Jianlonghuan Technology Co., Ltd., China Construction Technology Co., Ltd., Guangdong Provincial Microbial Analysis and Testing Center, Wuxi Zhongrui Testing Co., Ltd. Division, Beijing Indoor and Automotive Environmental Purification Association, Beijing Weikang Environmental Protection Technology Co., Ltd. The main drafters of this standard. Dai Wenxin, Zhi Jinfang, Zhu Yongfa, Guo Fengxin, Zhu Li, Xie Xiaobao, Xian Caijun, He Mingxing, Cao Wenbin, Yao Wenqing, Xu Xuefeng, Song Jianrong, Liu Wenxiu, Yu Jianqiang, Tang Xiaoli, Gao Yuehong, and Cao Wenwei. The previous versions of the standards replaced by this standard are. --- GB/T 23761-2009. Test method for air purification performance of photocatalytic materials and products Degradation of acetaldehyde (or formaldehyde)

1 Scope

This standard specifies the principles, reagents or materials, equipment, samples, and tests for testing methods for air purification performance of photocatalytic materials and products. Procedure, test data processing and test report. This standard applies to photocatalytic materials and products to remove acetaldehyde (or formaldehyde) performance in the air.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 11605 humidity measurement method GB 19258 UV germicidal lamp GB/T 30706 Test method and evaluation of antibacterial performance of photocatalytic antibacterial materials and products under visible light GB/T 30809 UV light source for photocatalytic material performance test

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Photocatalytic air purification materials and products Photocatalytic materials and products Under the excitation of a certain light source, materials and products that can produce a photocatalytic effect and are suitable for air purification. 3.2 Zero-calibrationgas A gas made by mixing pure oxygen and pure nitrogen in a volume ratio of 2. 8. 3.3 Photocatalytic removal of acetaldehyde The amount of acetaldehyde removed by a certain number of photocatalytic materials under light conditions, in milligrams per hour square meter [mg/(h · m2)] or millimeters Gram cubic meters per hour [mg/(h · m3)]. 3.4 Removal rate of acetaldehyde Under light conditions, the ratio of acetaldehyde removal to its initial amount is expressed as a percentage. 3.5 Formaldehyde photocatalytic removal rate equivalentremovalratiobyphotocatalysisofformaldehyde Calculated from the photocatalytic removal rate of acetaldehyde and used to characterize the removal rate of formaldehyde, expressed as a percentage. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 23761-2020_English be delivered?

Answer: Upon your order, we will start to translate GB/T 23761-2020_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 23761-2020_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 23761-2020_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 23761-2020?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 23761-2020 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.