|
US$229.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
SN/T 4779.2-2017: Determination of chloride in bottled water for export--Method by ion selective electrode flow injection analysis
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 4779.2-2017 | English | 229 |
Add to Cart
|
3 days [Need to translate]
|
Determination of chloride in bottled water for export--Method by ion selective electrode flow injection analysis
| Valid |
SN/T 4779.2-2017
|
PDF similar to SN/T 4779.2-2017
Basic data | Standard ID | SN/T 4779.2-2017 (SN/T4779.2-2017) | | Description (Translated English) | Determination of chloride in bottled water for export--Method by ion selective electrode flow injection analysis | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | C53 | | Word Count Estimation | 10,176 | | Date of Issue | 2017-05-12 | | Date of Implementation | 2017-12-01 | | Regulation (derived from) | State-Quality-Inspection-Accreditation (2017) 228 | | Issuing agency(ies) | General Administration of Customs | SN/T 4779.2-2017: Determination of chloride in bottled water for export--Method by ion selective electrode flow injection analysis
---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 chlorine in bottled water - Flow injection ion selective electrode method)
People's Republic of China Entry-Exit Inspection and Quarantine Industry Standard
Determination of chlorine in exported bottled water
Flow injection ion selective electrode method
Released on.2017-05-12
2017-12-01 implementation
People's Republic
The General Administration of Quality Supervision, Inspection and Quarantine issued
Foreword
SN/T 4779 includes the following three parts.
---SN/T 4779.1-2017 Determination of fluorine in exported bottled water by flow injection ion selective electrode method;
--- SN/T 4779.3-2017 Determination of total hardness in outlet bottled water. Flow injection visible spectrophotometric method.
This part is the second part of SN/T 4779.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This part is proposed and managed by the National Certification and Accreditation Administration.
This section drafted by. Beijing Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China, Beijing Jitian Instrument Co., Ltd., Beijing Food Safety
Full Monitoring and Risk Assessment Center.
The main drafters of this section. Liu Xin, Kong Weiheng, Fan Fei, Liu Laifu, Xiao Jingze, Huang Erquan, Zhang Weimin, Sun Mengyu.
Determination of chlorine in exported bottled water
Flow injection ion selective electrode method
1 Scope
This part of SN/T 4779 specifies a flow injection ion selective electrode method for the determination of chlorine in bottled water.
This section applies to the determination of chlorine content in packaged drinking water and bottled drinking natural mineral water.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 6682 Analytical laboratory water specifications and test methods
3 Method summary
The sample and the total ionic strength regulator are diluted in a certain volume, and then detected by a flow injection ion selective electrode method, using an electromotive force
A standard curve was established based on the linear relationship between the logarithm of the chloride ion activity and the external standard method.
See Appendix A for a reference to the workflow.
4 reagents and materials
Unless otherwise stated, the reagents used are of analytical grade and the water should meet the requirements of Class I water specified in GB/T 6682.
4.1 Anhydrous potassium nitrate.
4.2 Total ionic strength modifier (1 mol/L potassium nitrate). Weigh 101 g of anhydrous potassium nitrate (4.1) and dilute to 1000 mL with water.
4.3 Chloride standard stock solution. 1000mg/L (calculated as Cl-).
4.4 Standard working fluid. separately draw the appropriate amount of chloride ion standard stock solution (4.3) in a group containing 10mL total ionic strength regulator (4.2)
In a 100mL volumetric flask, dilute to volume with water to obtain chloride ion concentrations of 4.50mg/L, 10.0mg/L, 20.0mg/L,
Standard solutions of 40.0 mg/L, 100 mg/L,.200 mg/L, and 400 mg/L. Standard working fluids need to be used now.
4.5 0.45 μm water filter.
5 Instruments and equipment
5.1 Flow Injection Analyzer (FIA). with a composite chloride ion selective electrode.
5.2 Analytical balance. The sensitivity is 0.01g.
5.3 Volumetric flask. 100mL, 1000mL.
5.4 Pipette. 5mL, 20mL.
5.5 Micro-pump. 100μL~1000μL.
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of SN/T 4779.2-2017_English be delivered?Answer: Upon your order, we will start to translate SN/T 4779.2-2017_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 SN/T 4779.2-2017_English with my colleagues?Answer: Yes. The purchased PDF of SN/T 4779.2-2017_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+ countriesQuestion 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 [email protected]. 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.
|