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GB/T 34532-2017 English PDF

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US$119.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 34532-2017: Coking wastewater -- Determination of ammonia nitrogen content -- Formaldehyde method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 34532-2017	119	Add to Cart	3 days	Coking wastewater -- Determination of ammonia nitrogen content -- Formaldehyde method	Valid

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Basic data

Standard ID: GB/T 34532-2017 (GB/T34532-2017)
Description (Translated English): Coking wastewater -- Determination of ammonia nitrogen content -- Formaldehyde method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G15
Classification of International Standard: 71.080
Word Count Estimation: 6,630
Date of Issue: 2017-10-14
Date of Implementation: 2018-05-01
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 34532-2017: Coking wastewater -- Determination of ammonia nitrogen content -- Formaldehyde method

---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.
Coking wastewater - Determination of ammonia nitrogen content - Formaldehyde method ICS 71.080 G15 National Standards of People's Republic of China Coking wastewater - Determination of ammonia nitrogen - Formaldehyde method 2017-10-14 Published 2018-05-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of 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 is proposed by China Iron and Steel Association. This standard by the National Coal Chemical Industry Standardization Technical Committee coking chemical points Technical Committee (SAC/TC469/SC3) centralized. This standard was drafted unit. Yunnan Coal Energy Co., Ltd., Beijing Xu Yang Technology Co., Ltd., Metallurgical Industry Information Standards Institute. The main drafters of this standard. Long Juxing, Mao Aiping, Li Ruomei, Zhang Zhongqiong, Zhang Yingwei, Sun Changjiang, Zhang Bin, Zheng Jing Xu. Coking wastewater - Determination of ammonia nitrogen - Formaldehyde method Warning --- personnel using this standard should have the formal laboratory work experience. This standard does not indicate all possible safety issues question. It is the user's responsibility to take appropriate safety and health measures and to ensure compliance with the requirements of the relevant state laws and regulations. Analysis process to avoid Free skin contact solution, waste must be recycled.

1 Scope

This standard specifies the method of determination of ammonia nitrogen content. This standard applies to the determination of ammonia nitrogen content in coking wastewater. Measurement range (mass concentration). 10.0 mg/L to 3500.0 mg/L.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. Preparation of chemical reagent standard titration solution GB/T 601-2002 GB/T 6682 analytical laboratory water specifications and test methods GB/T 12808 laboratory glassware single standard pipette Water quality - Determination of ammonia - Distillation - Neutralization titration method

3 principle

In neutral solutions, ammonium salts react with formaldehyde to form hexamethylenetetramine and an acid equivalent to the ammonium salt content, with hydrogen in the presence of an indicator Sodium oxide standard solution titration. 6HCHO 2 (NH 4) 2 SO 4 = (CH 2) 6 N 4 2H 2 SO 4 6H 2 O H2SO4 2NaOH = Na2SO4 2H2O

4 reagents and materials

In the analysis process, only use approved analytical reagent and meet the GB/T 6682 provisions of more than three distilled water or its purity equivalent Water. 4.1 sulfuric acid solution (1%). Take 5.6mL sulfuric acid (density 1.84g/mL), slowly poured into about 700mL water, cooled, diluted with water To 1000 mL. 4.2 Sodium hydroxide solution (20 g/L) 20 g of sodium hydroxide are dissolved in 100 mL of carbon dioxide-free water, cooled and treated with carbon dioxide free Water diluted to 1000mL. 4.3 Neutral formaldehyde solution (25%). Take 676mL formaldehyde (content 37.0% ~ 40.0%), in 1000mL volumetric flask, diluted with water To the mark, before use phenolphthalein indicator solution (see 4.6) as an indicator, with sodium hydroxide standard solution (see 4.4) and neutral to neutral. 4.4 sodium hydroxide standard titration solution .c (NaOH) = 0.1mol/L (prepared according to GB/T 601-2002 in 4.1). 4.5 Methyl red indicator solution (1 g/L) 0.1 g methyl red is dissolved in a small amount of ethanol (95%) and diluted to 100 mL with ethanol (95%). 4.6 Phenolphthalein indicator solution (10 g/L) 1 g of phenolphthalein was dissolved in a small amount of ethanol (95%) and diluted to 100 mL with ethanol (95%). ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 34532-2017_English be delivered?

Answer: Upon your order, we will start to translate GB/T 34532-2017_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 34532-2017_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 34532-2017_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.