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NB/T 11531-2024 English PDF

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US$319.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
NB/T 11531-2024: Determination of total phosphorus, ammonia nitrogen, permanganate index in coal mine water - Flow injection-spectrophotometry
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
NB/T 11531-2024	319	Add to Cart	4 days	Determination of total phosphorus, ammonia nitrogen, permanganate index in coal mine water - Flow injection-spectrophotometry	Valid

Basic data

Standard ID: NB/T 11531-2024 (NB/T11531-2024)
Description (Translated English): Determination of total phosphorus, ammonia nitrogen, permanganate index in coal mine water - Flow injection-spectrophotometry
Sector / Industry: Energy Industry Standard (Recommended)
Classification of Chinese Standard: D04
Classification of International Standard: 13.060.30
Word Count Estimation: 15,168
Date of Issue: 2024-05-24
Date of Implementation: 2024-11-24
Issuing agency(ies): National Energy Administration

NB/T 11531-2024: Determination of total phosphorus, ammonia nitrogen, permanganate index in coal mine water - Flow injection-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.
ICS 13.060.30 CCSD04 Energy Industry Standards of the People's Republic of China Total phosphorus, ammonia nitrogen and permanganate index content in coal mine water Flow injection-spectrophotometry The National Energy Administration released

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Working principle of flow injection analyzer 1 5 Determination of total phosphorus 1 6 Determination of ammonia nitrogen 5 7 Determination of permanganate index 7 8 Test Report 10 9 Waste Disposal10

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Coal Industry Association. This document is under the jurisdiction of the National Coal Standardization Technical Committee (SAC/TC42). The drafting units of this document. Henan Institute of Geology, Chongqing Institute of Geology and Mineral Resources. The main drafters of this document are. Shi Yongli, Zhu Shaojun, Xu Zhaolei, Li Linji, Zhang Zhaoxin, Li Heping, Liu Suqing, Lu Xiaohai, Zhang Xia, Qu Yahui, Cao Cui and Su Fangfang. Total phosphorus, ammonia nitrogen and permanganate index content in coal mine water Flow injection-spectrophotometry Warning---The chemical reagents used in the experiment, such as sodium nitrosoferrocyanide, are harmful to human health. When operating, you should wear Wear protective gear and avoid contact with skin and clothing.

1 Scope

This document describes the determination of total phosphorus, ammonia nitrogen and permanganate index in coal mine water using flow injection-spectrophotometry. This document is applicable to the determination of total phosphorus, ammonia nitrogen and permanganate index in coal mine water. When the detection optical path is 10 mm, the method detection limits and determination limits of total phosphorus, ammonia nitrogen and permanganate index of this method are shown in Table 1. Table 1 Detection limit and determination limit of the method The unit is milligrams per liter (mg/L) Determination items Total phosphorus (in terms of P) Ammonia nitrogen (in terms of N) Permanganate index Method detection limit 0.004 0.02 0.20 Determination lower limit 0.016 0.08 0.80

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 6682 Specifications and test methods for water used in analytical laboratories

3 Terms and definitions

There are no terms or definitions that require definition in this document.

4 Working principle of flow injection analyzer

In a closed pipeline, a certain volume of sample is injected into the continuously flowing carrier liquid, and the sample and reagents are reacted in the chemical reaction module according to specific The substances are mixed and reacted in a certain order and proportion, and under the condition of incomplete reaction, they enter the flow detection cell for photometric detection.

5 Determination of total phosphorus

5.1 Principle Under acidic conditions, various forms of phosphorus in the sample were hydrolyzed at 125℃ under high temperature and pressure, and then mixed with potassium persulfate solution for UV disinfection. The solution is completely oxidized to orthophosphate, which reacts with ammonium molybdate to form phosphomolybdic acid under the catalysis of antimony salt. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of NB/T 11531-2024_English be delivered?

Answer: Upon your order, we will start to translate NB/T 11531-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of NB/T 11531-2024_English with my colleagues?

Answer: Yes. The purchased PDF of NB/T 11531-2024_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.