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GB/T 15452-2009 English PDF

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US$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 15452-2009: Industrial circulating cooling water -- Determination of calcium and magnesium -- EDTA titration method
Status: Valid

GB/T 15452: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 15452-2009	189	Add to Cart	3 days	Industrial circulating cooling water -- Determination of calcium and magnesium -- EDTA titration method	Valid
GB/T 15452-1995	199	Add to Cart	2 days	Industrial circulating cooling water--Determination of calcium and magnesium--EDIT titration method	Obsolete

Similar standards

GB/T 14637 GB/T 14636 GB/T 15453 GB/T 15456 GB/T 15454

Basic data

Standard ID: GB/T 15452-2009 (GB/T15452-2009)
Description (Translated English): Industrial circulating cooling water -- Determination of calcium and magnesium -- EDTA titration method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G76
Classification of International Standard: 71.040.40
Word Count Estimation: 8,824
Date of Issue: 2009-05-18
Date of Implementation: 2010-02-01
Older Standard (superseded by this standard): GB/T 15452-1995
Quoted Standard: GB/T 601; GB/T 603; GB/T 6682
Adopted Standard: ISO 6059-1984, NEQ
Regulation (derived from): National Standard Approval Announcement 2009 No.6 (Total No.146)
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
Summary: This standard specifies the calcium Industrial circulating cooling water, determination of magnesium ion content. This standard applies to the calcium content of industrial circulating cooling water in 2mg/L ~ 200mg/L, magnesium content 2mg/L ~ 200mg measured/L of. Also applies to other industrial water and calcium in the raw water, Determination of magnesium ion content.

GB/T 15452-2009: Industrial circulating cooling water -- Determination of calcium and magnesium -- EDTA titration 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.
Industrial circulating cooling water.Determination of calcium and magnesium.EDTA titration method ICS 71.040.40 G76 National Standards of People's Republic of China Replacing GB/T 15452-1995 Industrial circulating cooling water calcium, magnesium ions measured EDTA titration (ISO 6059. 1984, Waterquality-Determinationofthesumof calciumandmagnesium-EDTAtitrimetricmethod, NEQ) Posted 2009-05-18 2010-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard corresponds to ISO 6059. 1984 "Quality of calcium, magnesium alloy contents - EDTA titration method" (in English), and ISO 6059. 1984 non-equivalent. This standard replaces GB/T 15452-1995 "Industrial circulating cooling water calcium and magnesium - EDTA titration." This standard compared with GB/T 15452-1995, no change in technical content, but the structure of the text and text has been modified. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee of Chemical Water Treatment Chemicals Branch (SAC/TC63/SC5) centralized. This standard is drafted by. CNOOC Tianjin Chemical Research & Design Institute, Guangzhou City Special Pressure Equipment Inspection and Research Institute. The main drafters of this standard. Zhuchuan Jun, Shao Hongqian, Mabo group, Li-hua, Yang Lin. This standard was first published in 1995. Industrial circulating cooling water calcium, magnesium ions measured EDTA titration

1 Scope

This standard specifies the calcium and magnesium ion content determination method for industrial circulating cooling water. This standard applies to the calcium content of industrial circulating cooling water in the 2mg/L ~ 200mg/L, magnesium content of 2mg/L ~ 200mg/L of Determination, also applies to the raw water with water, calcium, magnesium and other industrial measuring ion content.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. Preparation of GB/T 601 chemical reagent standard titration solution GB/T 603 chemical reagent test method Preparations of articles (GB/T 603-2002, ISO 6353-1 with. 1982, NEQ) GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)

3 Method summary

Calcium is measured at pH 12 to 13, calcium - carboxylic acid as indicator, water samples of calcium ions with EDTA standard titration solution Sub content. EDTA solution with the free calcium ions should only form a complex titration, the solution changes color from purple to light blue when It is the end. Magnesium ions is measured at pH 10, with chrome black T as indicator, determination of calcium with EDTA standard titration solution, magnesium ions combined amount of dissolved It shall end when the liquid color from purple to pure blue, minus the calcium content of calcium and magnesium is a magnesium ion content of the combined amount.

4 Reagents and materials

The reagents used in this standard, unless otherwise specified, shall use analytical reagent and in line with GB/T 6682 stipulated three of water. Standard Solution, test preparation and products required, did not indicate when the other requirements, according to GB/T 601, GB/T 603 of Regulation Set preparation. Sulfuric acid solution was 4.1. 1 + 1. 4.2 persulfate solution. 40g/L, stored in a brown bottle (valid for 1 month). 4.3 triethanolamine solution. 1 + 2. 4.4 Potassium hydroxide solution.200g/L. 4.5 ammonia - ammonium chloride buffer solution (A). pH = 10. 4.6 disodium EDTA standard titration solution. Ba (EDTA) about 0.01mol/L. 4.7 Calcium - carboxylic indicator. 0.2g Calcium - indicator carboxylic acid [2-hydroxy-1- (2-hydroxy-4-sulfo-1-naphthyl-azo) -3-naphthoic acid] and 100g chlorine Potassium mixing and grinding evenly, stored in a grinding jar. 4.8 chrome black T indicator solution. dissolve 0.50g chrome black T [1- (1- hydroxy-2-azo-6-nitro - naphthol 4-sulfonate)] in 85mL triethanolammonium Amine, then add 15mL ethanol. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 15452-2009_English be delivered?

Answer: Upon your order, we will start to translate GB/T 15452-2009_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 15452-2009_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 15452-2009_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 15452-2009?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 15452-2009 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.