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GB/T 23836-2009 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 23836-2009: Determination of molybdate in industrial circulating cooling water -- Spectrometric method using thiocyanate
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23836-2009	189	Add to Cart	3 days	Determination of molybdate in industrial circulating cooling water -- Spectrometric method using thiocyanate	Valid

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Basic data

Standard ID: GB/T 23836-2009 (GB/T23836-2009)
Description (Translated English): Determination of molybdate in industrial circulating cooling water -- Spectrometric method using thiocyanate
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G76
Classification of International Standard: 71.040.40
Word Count Estimation: 8,881
Date of Issue: 2009-05-18
Date of Implementation: 2010-02-01
Regulation (derived from): PRC 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 method for measuring industrial circulating cooling water molybdate content. This standard applies to the determination in the 100mg/L range 2mg/L ~ in molybdate content.

GB/T 23836-2009: Determination of molybdate in industrial circulating cooling water -- Spectrometric method using thiocyanate

---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.
Determination of molybdate in industrial circulating cooling water. Spectrometric method using thiocyanate ICS 71.040.40 G76 National Standards of People's Republic of China Industrial circulating cooling water molybdate content Thiocyanate spectrophotometric 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

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. Royal Nanjing Water Science and Technology Co., Ltd., CNOOC Tianjin Chemical Research & Design Institute. The main drafters of this standard. Chen Wei, Bai Ying, Li Lin, Shao Hongqian, Zhuzhuan Jun. Industrial circulating cooling water molybdate content Thiocyanate spectrophotometric

1 Scope

This standard specifies the method for determination of industrial circulating cooling water molybdate content. This standard applies to the determination in the 100mg/L range 2mg/L ~ in molybdate 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. GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) Principle 3 Reducing agent ascorbic acid can be reduced to molybdate Mo5 +, under acidic conditions, Mo5 + and thiocyanate complexes formed orange. in Absorbance was measured at 460nm wavelength of maximum absorption.

4 Reagents and materials

This standard reagents and water, unless otherwise specified, shall use analytical reagent and in line with GB/T 6682 three water requirements. Safety Tips. The criteria used acid is corrosive, should pay attention. When contacted, rinse with plenty of water, avoid inhaling Or contact with the skin. Sulfuric acid solution was 4.1. 1 + 1. 4.2 ferrous ion solution. 5g/L. Weigh 3.51g of ferrous ammonium sulfate [(NH4) 2Fe (SO4) 2 · 6H2O] in 100mL beaker, add 50mL water, was added slowly 4.5mL of sulfuric acid, with stirring. After cooling, dilute with water to 100mL, and mix. 4.3 ascorbic acid solution. 100g/L. 10g ascorbic acid dissolved in 100mL of water, shake, stored in a brown bottle in the refrigerator is stable for 15 days. 4.4 ammonium thiocyanate solution. 100g/L. 4.5 molybdate stock standard solution. 1mL containing 1mgMoO42-. Weigh 0.7565g sodium molybdate (Na2MoO4 · 2H2O), accurate to 0.2mg, about 200mL water dissolved quantitatively transferred to 500mL volumetric flask, dilute to the mark, shake. 4.6 molybdate standard solution. 1mL containing 0.1mgMoO42-. Take 50.00mL molybdate stock standard solution in 500mL flask, diluted with water to the mark.

5 instruments and equipment

Spectrophotometer. absorption cell with a thickness of 10mm light path. Step 6 Analysis 6.1 Draw a calibration curve Pipette 0, respectively (blank), 0.50,1.00,2.00,3.00,4.00,5.00mL molybdate standard solution in seven 50mL volumetric flask ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 23836-2009_English be delivered?

Answer: Upon your order, we will start to translate GB/T 23836-2009_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 23836-2009_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 23836-2009_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.