|
US$259.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
DZ/T 0253.2-2014: Analytic methods for biologic samples in eco-geochemistry assessment. Part 2: Determination of selenium content. Fluorescent spectrophotometry
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| DZ/T 0253.2-2014 | English | 259 |
Add to Cart
|
3 days [Need to translate]
|
Analytic methods for biologic samples in eco-geochemistry assessment. Part 2: Determination of selenium content. Fluorescent spectrophotometry
| Valid |
DZ/T 0253.2-2014
|
PDF similar to DZ/T 0253.2-2014
Basic data | Standard ID | DZ/T 0253.2-2014 (DZ/T0253.2-2014) | | Description (Translated English) | Analytic methods for biologic samples in eco-geochemistry assessment. Part 2: Determination of selenium content. Fluorescent spectrophotometry | | Sector / Industry | Geological Industry Standard (Recommended) | | Classification of Chinese Standard | Z39 | | Classification of International Standard | 67.050 | | Word Count Estimation | 10,168 | | Date of Issue | 4/15/2014 | | Date of Implementation | 6/1/2014 | | Quoted Standard | GB/T 6379.2; GB/T 6379.4; DZ/T 0253.1-2014 | | Regulation (derived from) | MLR 2014 Announcement No. 5 | | Issuing agency(ies) | Ministry of Land and Resources | | Summary | This Standard specifies the atomic fluorescence spectrometric method ecological geochemical assessment of selenium content of animal and plant specimens. This section applies to the evaluation of ecological geochemical samples of plants and animals in ato | DZ/T 0253.2-2014: Analytic methods for biologic samples in eco-geochemistry assessment. Part 2: Determination of selenium content. Fluorescent spectrophotometry
---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.
Analytic methods for biologic samples in eco-geochemistry assessment.Part 2. Determination of selenium content.Fluorescent spectrophotometry
ICS 67.050
Z39
People's Republic of China geological mineral industry standard
Ecological geochemical evaluation method for animal and plant samples
Part 2. Determination of selenium content
Atomic fluorescence spectrometry
Part 2.Determinationofseleniumcontent-
Released on.2014-04-15
2014-06-01 implementation
Ministry of Land and Resources of the People's Republic of China
Content
Foreword III
Introduction IV
1 Scope 1
2 Normative references 1
3 Principle 1
4 reagent 1
5 instruments and equipment 2
6 sample 2
7 Analysis step 2
8 result calculation 3
9 precision 3
10 correctness 4
11 Quality Assurance and Control 4
Appendix A (informative) Instrument reference working conditions 5
Foreword
--- Part 1. Determination of the amount of 19 elements of lithium, boron, bismuth, etc. by inductively coupled plasma mass spectrometry (ICP-MS);
--- Part 2. Determination of selenium content by atomic fluorescence spectrometry;
---Part 3. Determination of total mercury - Cold atomic fluorescence spectrometry;
--- Part 4. Determination of the amount of fluorine - Spectrophotometric method.
This part is the second part of DZ/T 0253.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This part is proposed by the Ministry of Land and Resources of the People's Republic of China.
This part is under the jurisdiction of the National Land Resources Standardization Technical Committee.
This section drafted by. National Geological Experimental Testing Center.
Drafters of this section. Sun Dezhong, Ma Shengfeng, Fan Fan, Wang Suming, Xu Chunxue, An Ziyi.
Introduction
The analysis of eco-geochemical survey and evaluation samples is carried out with the gradual development and deepening of multi-target geochemical survey work.
An analytical work aimed at the assessment of the results of multi-target geochemistry or other regional geochemical surveys.
The system includes river ecosystems, farmland ecosystems, urban ecosystems, shallow sea ecosystems, and grassland ecosystems for evaluation.
In the evaluation stage of the eco-geochemical survey, based on the results of the soil circle survey, further recourse to elements in the lithosphere, soil circle, hydrosphere
Selecting typical and representative regions for migration and transformation in the biosphere, and selecting multi-media sampling and selectivity indicators
Component analysis and activity state analysis, biology (including animals and plants) is one of the main work objects of this stage of analysis and testing.
The elements that make up the organism come from the geological environment, and the organism exchanges substances with the environment continuously. This exchange involves solid phase (lithosphere) and liquid.
The phase (hydrosphere) and the gas phase (atmosphere) eventually tend to be a dynamic equilibrium. Geochemical elements from the surface of the earth's crust, weathered by the parent rock
It is released into the soil and then activated into an effective state to be absorbed by the plant. The elements that enter the plant will inevitably affect its growth and development.
Sound, thus affecting the yield and quality of the plant, and then entering the animal and the human body through the food chain, and also the growth and health of the animal and the human body.
Important impact on life. Therefore, ecological geochemical evaluation will ultimately use biological sample analysis to illustrate the problem.
Ecological geochemical evaluation method for animal and plant samples
Part 2. Determination of selenium content
Atomic fluorescence spectrometry
Cautions - Personnel using this section should have hands-on experience in formal laboratory work. This section does not point out all possible security questions.
question. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set by the relevant national regulations.
1 Scope
This part of DZ/T 0253 specifies the method of atomic fluorescence spectrometry for the determination of selenium in animal and plant samples by eco-geochemical evaluation.
This section applies to the determination of the amount of selenium in the animal and plant samples by eco-geochemical evaluation by atomic fluorescence spectrometry.
The method detection limit was 0.007 μg/g.
Selenium is measured in the range of 0.02 μg/g to 10 μg/g.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 6379.2 Accuracy of measurement methods and results (accuracy and precision) Part 2. Determination of standard method of measurement
Basic method of sex and reproducibility
GB/T 6379.4 Accuracy of measurement methods and results (accuracy and precision) Part 4. Determining the standard measurement method correctly
Basic method of degree
DZ/T 0253.1-2014 Eco-geochemical evaluation method for the analysis of animal and plant samples - Part 1 . 19 elements of lithium, boron, vanadium
Inductively Coupled Plasma Mass Spectrometry (ICP-MS)
3 Principle
The sample was digested with high temperature and high pressure in a special microwave digestion apparatus with nitric acid and hydrogen peroxide. The sample was sampled in a 6 mol/L hydrochloric acid medium.
Reduction of hexavalent selenium to tetravalent selenium, using sodium borohydride (NaBH4) or potassium borohydride (KBH4) as a reducing agent, and divalent selenium in a hydrochloric acid medium
The original hydrogen selenide (H2Se) is carried by the carrier gas (argon) into the atomizer for atomization. Under the illumination of the selenium hollow cathode lamp, the ground state selenium atom is
Excited to a high energy state, when deactivated back to the ground state, a characteristic wavelength of fluorescence is emitted, and the fluorescence intensity is proportional to the selenium content. And standard department
Columns are compared quantitatively.
4 reagents
Unless otherwise stated in this section, superior grade pure reagents and distilled water or equivalent purity water in accordance with national standards are used in the analysis. main
Reagents include.
4.1 Nitric acid (ρ = 1.42 g/mL).
4.2 Hydrogen peroxide [w(H2O2) = 30%].
4.3 Hydrochloric acid (ρ = 1.19 g/mL).
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of DZ/T 0253.2-2014_English be delivered?Answer: Upon your order, we will start to translate DZ/T 0253.2-2014_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 DZ/T 0253.2-2014_English with my colleagues?Answer: Yes. The purchased PDF of DZ/T 0253.2-2014_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.
|