GB/T 39306-2020 English PDF

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GB/T 39306-2020: (Reclaimed water quality determination of total arsenic atomic fluorescence spectrometry)
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39306-2020	99	Add to Cart	3 days	(Reclaimed water quality determination of total arsenic atomic fluorescence spectrometry)	Valid

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Basic data

Standard ID: GB/T 39306-2020 (GB/T39306-2020)
Description (Translated English): (Reclaimed water quality determination of total arsenic atomic fluorescence spectrometry)
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G76
Word Count Estimation: 5,576
Date of Issue: 2020-11-19
Date of Implementation: 2021-10-01
Regulation (derived from): National Standard Announcement No. 26 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 39306-2020: (Reclaimed water quality determination of total arsenic atomic fluorescence spectrometry)

---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.
(Reclaimed water quality determination of total arsenic atomic fluorescence spectrometry) ICS 13.060.50;71.040.40 G76 National Standards of People's Republic of China Determination of Total Arsenic in Reclaimed Water Atomic fluorescence spectrometry 2020-11-19 released 2021-10-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Petroleum and Chemical Industry Federation. This standard is under the jurisdiction of the National Chemical Standardization Technical Committee (SAC/TC63). Drafting organizations of this standard. Henan Qingshuiyuan Technology Co., Ltd., Guangzhou Special Pressure Equipment Testing and Research Institute, Beijing Institute of Technology Maritime College, China Testing and Certification Group Co., Ltd., Landscaping (Xiamen) Water Treatment Technology Co., Ltd., CNOOC Tianjin Chemical Research and Design Institute Co., Ltd., Hunan Decheng Testing Co., Ltd., Beijing Haiguang Instrument Co., Ltd., Zhejiang Shuizhiyin Testing Co., Ltd., Nanjing University. The main drafters of this standard. Wang Zhiqing, Du Yuhui, Wang Lei, Liu Wenqiu, Wang Zhiwei, Bai Ying, Ouyang Chengwen, Liu Haitao, Hu Lei, Li Kan. Determination of Total Arsenic in Reclaimed Water Atomic fluorescence spectrometry Warning---The strong acids and bases used in this standard are corrosive. Avoid inhalation or contact with the skin during use. Splash on the body should be used immediately Rinse with water, and seek medical attention immediately in severe cases.

1 Scope

This standard specifies the determination method of total arsenic content in reclaimed water-atomic fluorescence spectrometry. This standard applies to the determination of the total arsenic content in reclaimed water of 0.1μg/L~50μg/L.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 602 Preparation of standard solutions for impurity determination of chemical reagents GB/T 6682 Analytical laboratory water specifications and test methods

3 Method summary

After the sample is digested with acid, thiourea is added to pre-reduce pentavalent arsenic to trivalent arsenic, and then potassium borohydride is added to make all trivalent arsenic further It is reduced to produce arsine, which is decomposed into atomic arsenic by argon loaded into the quartz atomizer, and is excited by the emission light of the arsenic hollow cathode lamp. Sub-fluorescence, whose fluorescence intensity is directly proportional to the concentration of arsenic in the measured solution under fixed conditions, and thus the total arsenic content in the water sample is measured.

4 Reagents or materials

4.1 The reagents and water used in this standard, unless otherwise specified, use superior grade pure reagents and secondary water specified in GB/T 6682. 4.2 The standard solution for impurity determination required in the test shall be prepared according to GB/T 602 or used commercially if no other requirements are indicated. Solution. 4.3 Hydrochloric acid. 4.4 Nitric acid. 4.5 Hydrochloric acid solution.1 19. 4.6 Nitric acid solution. 14. 4.7 Thiourea-ascorbic acid solution. 100g/L. Weigh 50.0g thiourea (analytical pure) and 50.0g ascorbic acid (analytical pure) in In a 500mL beaker, add water to dissolve and dilute to 500mL. 4.8 Potassium borohydride-sodium hydroxide solution. Weigh 2.0g sodium hydroxide (analytical purity) and 10.0g potassium borohydride (analytical purity) in a polyethylene beaker In the medium, dissolve and dilute to 1000mL with water, this solution is ready to use. 4.9 Arsenic standard stock solution. 0.1mg/mL. 4.10 Arsenic standard solution. 0.1μg/mL. Pipette 10.00mL arsenic standard stock solution into a 100mL volumetric flask, add 10.0mL salt Acid, dilute to the mark with water, and mix well. Before use, pipette 1.00mL of this solution into a 100mL volumetric flask, add 10.0mL hydrochloric acid, and water ......

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