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GB/T 32737-2016 English PDF

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US$219.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 32737-2016: Determination of nitrate nitrogen in soil -- Ultraviolet spectrophotometry method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 32737-2016	219	Add to Cart	3 days	Determination of nitrate nitrogen in soil -- Ultraviolet spectrophotometry method	Valid

Similar standards

NY/T 2543 NY/T 2272 LY/T 1231 GB/T 32739 GB/T 32738

Basic data

Standard ID: GB/T 32737-2016 (GB/T32737-2016)
Description (Translated English): Determination of nitrate nitrogen in soil -- Ultraviolet spectrophotometry method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: B10
Classification of International Standard: 13.080.10
Word Count Estimation: 11,123
Date of Issue: 2016-08-29
Date of Implementation: 2017-03-01
Regulation (derived from): National Standard Announcement 2016 No.14
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

GB/T 32737-2016: Determination of nitrate nitrogen in soil -- Ultraviolet spectrophotometry 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.
Determination of nitrate nitrogen in soil - Ultraviolet spectrophotometry method ICS 13.080.10 B10 National Standards of People's Republic of China Determination of Soil Nitrate Nitrogen by UV Spectrophotometry 2016-08-29 released 2017-03-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed by the Ministry of Agriculture of the People's Republic of China. This standard is under the responsibility of the National Soil Quality Standardization Technical Committee (SAC/TC404). The drafting of this standard. Nanjing Institute of Soil Science, Chinese Academy of Sciences, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Chinese Academy of Sciences Shuangbanna Tropical Botanical Garden, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, China National Institute of Applied Ecology, Institute of Botany, Chinese Academy of Sciences, Jiangsu Provincial Institute of Standardization. The main drafters of this standard. Sun Bo, Song Ge, Zhang Yuming, Chen Anlei, Fu Yun, Han Yong, Zong Haihong, Qiao Yunfa, Zhang Yan, He Nianpeng, Determination of Soil Nitrate Nitrogen by UV Spectrophotometry

1 Scope

This standard specifies the principle, reagent, instrument, analysis procedure and result of the determination of nitrate nitrogen in soil leaching solution by ultraviolet spectrophotometry. Calculation and representation, precision, quality assurance and control. This standard applies to the determination of nitrate in soil. The detection limit of soil nitrate nitrogen was 0.5mg/kg, and the limit of quantification was 1mg/kg.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. GB/T 6682 Analytical laboratory water specifications and test methods HJ634 Soil Ammonia Nitrogen, Nitrite Nitrogen, Nitrate Nitrogen Determination Potassium Chloride Solution Extraction-Spectrophotometry Method for determination of soil moisture Determination of pH in soil by NY/T 1377

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Absorbance absorbance The intensity of the incident light before passing through the soil leaching solution and the ratio of the transmitted light intensity after the light passes through the soil leaching solution The logarithm. 3.2 f value fvalue The ratio of the absorbance at the wavelength of 220 nm to the absorbance at 275 nm in the soil leaching solution.

4 principle

The use of nitrate leachate in the soil near the wavelength of 220nm absorption and absorbance of the size and nitrate concentration The nitrite content was quantitatively determined. Using the dissolved organic matter at 220nm and 275nm wavelength are absorbed, While the nitrate ion at 275nm wavelength does not absorb the characteristics of the soil leaching solution at 275nm absorbance, multiplied by a school The positive factor (f value) is used to eliminate the interference caused by the absorption of organic matter at 220 nm.

5 reagent

Unless otherwise specified, only analytical reagents shall be used in the analysis, and the water used shall comply with the requirements for Grade 3 water in GB/T 6682. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 32737-2016_English be delivered?

Answer: Upon your order, we will start to translate GB/T 32737-2016_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 32737-2016_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 32737-2016_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.