GB/T 39305-2020 English PDF

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GB/T 39305-2020: (Reclaimed water quality Determination of fluorine, chlorine, nitrite, nitrate and sulfate ion chromatography)
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39305-2020	189	Add to Cart	3 days	(Reclaimed water quality Determination of fluorine, chlorine, nitrite, nitrate and sulfate ion chromatography)	Valid

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Basic data

Standard ID: GB/T 39305-2020 (GB/T39305-2020)
Description (Translated English): (Reclaimed water quality Determination of fluorine, chlorine, nitrite, nitrate and sulfate ion chromatography)
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G76
Word Count Estimation: 10,131
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 39305-2020: (Reclaimed water quality Determination of fluorine, chlorine, nitrite, nitrate and sulfate ion chromatography)

---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 fluorine, chlorine, nitrite, nitrate and sulfate ion chromatography) ICS 13.060.50;71.040.40 G76 National Standards of People's Republic of China Reclaimed water quality fluorine, chlorine, nitrite, nitrate, Determination of sulfate radicals by ion chromatography 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. Nanjing Yushui Technology Co., Ltd., Henan Qingshuiyuan Technology Co., Ltd., Guangzhou Special Pressure Equipment Testing Research Institute, CNOOC Tianjin Chemical Research and Design Institute Co., Ltd., Lanbao (Xiamen) Water Treatment Technology Co., Ltd., State Grid Tianjin Electric Power Company Electric Power Research Institute, Zhejiang Shuizhiyin Testing Co., Ltd., Metrohm China Co., Ltd., Chongqing University, Nanjing University. The main drafters of this standard. Chen Wei, Yang Haixing, Yang Lin, Li Lin, Wang Zhiwei, Zheng Zhongyuan, Lu Qinghua, Wang Zhongguang, Zheng Huaili, Hu Haidong, Zheng Hongguo. Reclaimed water quality fluorine, chlorine, nitrite, nitrate, Determination of sulfate radicals by ion chromatography

1 Scope

This standard specifies the determination of fluoride ion (F-), chloride ion (Cl-), nitrite ion (NO2-) and nitric acid in reclaimed water by ion chromatography. Root ion (NO3-), sulfate ion (SO42-) method. This standard applies to the content of fluoride ion (F-), chloride ion (Cl-), nitrate ion (NO3-) and sulfate ion (SO42-) in regenerated water Amount ≥ 0.10mg/L; determination of nitrite ion (NO2-) content ≥ 0.05mg/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 33087 Specifications and test methods of high-purity water for instrumental analysis

3 Method summary

The anion to be measured in the sample enters the ion exchange column system (composed of a guard column and a separation column) with the eluent, and according to each anion in the chromatography The difference in ion exchange capacity on the column achieves separation. The separated anions enter the conductivity detector with the eluent for determination. The relative retention time is qualitative, and it is quantified by peak height or peak area.

4 Interference

4.1 In ion chromatography, when the concentration of a component in the sample is very high, the chromatogram will correspond to peak broadening, which masks the effects of other components. Peaks, causing interference. This interference can usually be reduced by appropriately diluting the sample according to the concentration of other anions; or separating dry The method of disturbing ions reduces interference. 4.2 Due to the complex composition of reclaimed water, some organic matter, especially organic matter containing benzene ring, permanently adsorbs the resin of the separation column, making the separation The adsorption capacity of the column is reduced, and the column is damaged, which interferes with the measurement. Usually a pretreatment column is used for treatment. 4.3 Since the conductivity of water is lower than that of the eluent, the water in the sample will produce a negative peak in the chromatogram during the elution, see Appendix A eliminates water negative peaks.

5 Reagents or materials

5.1 Unless otherwise specified, the reagents and water used in this standard shall be degassed using superior grade pure reagents and complying with the requirements of GB/T 33087 deal with. Note. The purity of water and reagents affects the detection limit of the method. It is recommended to prepare a standard solution with freshly prepared water. 5.2 Eluent. Prepare according to the instrument model and chromatographic column instructions. 5.3 Regeneration fluid. prepare according to the suppressor model and instruction manual. ......

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