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MT/T 746-1997: Technical condition for compound fertilizer of humic acids from coal
Status: Obsolete
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Technical condition for compound fertilizer of humic acids from coal
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MT/T 746-1997
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PDF similar to MT/T 746-1997
Standard similar to MT/T 746-1997 NY/T 798 NY 525 NY 1110 Basic data | Standard ID | MT/T 746-1997 (MT/T746-1997) | | Description (Translated English) | Technical condition for compound fertilizer of humic acids from coal | | Sector / Industry | Coal Industry Standard (Recommended) | | Classification of Chinese Standard | B10 | | Classification of International Standard | 75.160.10 | | Word Count Estimation | 8,846 | | Date of Issue | 12/12/1997 | | Date of Implementation | 7/1/1998 | | Quoted Standard | GB/T 6679-1986; GB/T 8572-1988; GB/T 8576-1988; GB/T 8577-1988; GB 15063-1994 | | Summary | This standard specifies the coal humic acid fertilizer technical requirements, measuring methods, inspection rules, packaging, labeling, transport and storage. This standard applies to coal as raw material humic acid fertilizer (including blending fertilizer and various special fertilizer). | MT/T 7: ---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.
Technical condition for compound fertilizer of humic acids from coal
ICS 75.160.10
B10
People's Republic of China Coal Industry Standard
MT/T 746-2008
Technical conditions of coal-based humic acid compound fertilizer
Published on December 12,.1997
1998-07-01 Implementation
Published by the Ministry of Coal Industry of the People's Republic of China
Contents
Foreword Ⅱ
1 Scope 1
2 Normative references 1
3 Technical requirements 1
4 Determination method 1
5 Inspection rules 3
6 Packaging, marking, transport and storage 4
Foreword
This standard was prepared with reference to GB 11957-69 coal humic acid yield determination method, GB 15063-94 compound fertilizer and ZBG21005-87 sodium humate.
There are currently no international or national standards available.
Humic acid compound fertilizer is a new type of organic-inorganic compound (mixed) fertilizer, which can improve the physical and chemical properties of soil and improve the utilization of nutrients.
Rate, improve crop quality, improve crop stress resistance, and have obvious effects on increasing yield and income of various crops. In recent years, it has developed rapidly.
Industry spreads across the country. In order to make the industry develop healthily, this standard is specially formulated to strengthen management.
This standard is proposed by the Department of Science, Technology and Education of the Ministry of Coal Industry.
This standard is under the jurisdiction of the National Coal Standardization Technical Committee.
This standard was drafted. Luoyang Branch of Henan Coal Science Research Institute.
The main drafters of this standard. Hou Huoping and Mao Dongping.
This standard is entrusted to the Luoyang Branch of Henan Coal Research Institute for interpretation.
Technical conditions of coal-based humic acid compound fertilizer
1 Scope
This standard specifies the technical requirements, determination methods, inspection rules, packaging, marking, transportation and storage of coal-based humic acid compound fertilizers.
This standard applies to compound fertilizers (including blended fertilizers and various special fertilizers) based on coal humic acid.
2 Reference standards
The following standards contain provisions that, through reference in this standard, constitute provisions of this standard. When this standard was published, the editions shown were all
Is effective. All standards will be revised, and all parties using this standard should explore the possibility of using the latest versions of the following standards.
GB/T 6679-86 General rules for sampling solid chemical products
GB/T 8572-88 Determination of total nitrogen content in compound fertilizers Titration method after distillation
GB/T 8576-88 Determination of free water content in compound fertilizers Vacuum oven method
GB/T 8577-88 Determination of free water content in compound fertilizer Karl Fischer method
GB 15063-94 compound fertilizer
3 Technical requirements
3.1 Appearance. gray-black sphere or strip.
3.2 The product shall meet the requirements in Table 1.
4 Determination method
Except for special provisions in this standard, analytical reagents and distilled water or water of equivalent purity are used.
4.1 Appearance
Visual identification.
4.2 Determination of Humic Acid Yield
4.2.1 Method summary
Extract the humic acid from the sample with sodium pyrophosphate lye, precipitate the humic acid with excess inorganic acid, weigh the precipitate, and add
To correct.
4.2.2 Reagents
4.2.2.1 Hydrochloric acid (GB
622). 5% (V/V) solution.
4.2.2.2 Sodium pyrophosphate alkaline extraction solution. Weigh 15g of chemically pure sodium pyrophosphate (Na4P2O7 · 10H2O) (HG3-1288) and 7g of chemically pure sodium hydroxide
(GB 629) dissolved in 1L of distilled water and kept tightly closed.
4.2.3 Equipment
4.2.3.1 Analytical balance. Sensitivity 0.0001g.
4.2.3.2 Constant temperature water bath.
4.2.3.3 Constant temperature drying oven. The temperature can be controlled at 110 ℃ ± 5 ℃.
4.2.3.4 Centrifuge. The minimum speed is.2000r/min, and the volume of the centrifuge cup is greater than 150mL.
4.2.3.5 Muffle furnace.
4.2.3.6 Quantitative filter paper (blue ribbon).
4.2.3.7 Weighing bottle with ground stopper. 50mm in diameter and 30mm in height.
4.2.4 Measurement steps
4.2.4.1 Extraction
Weigh about 1g of the analytical sample with a particle size of less than 0.2mm (accurate to 0.0002g), put it in a 250mL Erlenmeyer flask A, and add sodium pyrophosphate alkaline extraction solution 100
mL, shake well, cover a small funnel at the mouth of the conical flask, put it in a water bath at 100 ℃ ± 1 ℃ (when the temperature is not reached, adjust with an appropriate amount of glycerin), heat and extract 2
h (shake every 0.5h), take it out, cool to room temperature, transfer it all into a centrifuge cup, and centrifuge at.2000r/min for 30min,
Decant the solution into another 500mL Erlenmeyer flask B, wash the insolubles twice with.200mL of water, and centrifuge after each wash.
Collect all the washing liquid into Erlenmeyer flask B.
4.2.4.2 Precipitation
Transfer the conical flask B solution to a 500mL volumetric flask, add water to the mark, shake well, take.200mL of the solution into a beaker, and add 20mL of hydrochloric acid (4.2.2.1)
Humic acid was allowed to settle, the suspension was centrifuged, and the supernatant was decanted.
4.2.4.3 Weighing
Dry the quantitative filter paper and weighing bottle in a drying box at 105 ℃ ~ 110 ℃ to constant weight in advance, and filter the humus obtained by 4.2.4.2 with filter paper.
For acid precipitation, move the filter paper with precipitation to a weighing bottle, dry it in a drying box at 105 ℃ ~ 110 ℃ for 2h, take it out, and cool it in a dryer to
Weigh at room temperature (about 20min). Repeat drying, cooling and weighing until the difference between two consecutive weighings is less than 0.001g, and calculate the humic acid precipitation
Mass of the sediment (m1).
4.2.4.4 Burn
Put the humic acid precipitate together with filter paper into a porcelain crucible of known quality, first ash at low temperature (200 ℃ ~ 250 ℃), and then at 600
Burn in a muffle furnace at ℃ ± 25 ℃ for 1h ~ 2h, take out the crucible, cool it in the air for 5min, then put it in a desiccator to cool to room temperature and weigh.
Repeat the burning, cooling and weighing until the difference between two consecutive weighings is less than 0.001g, and calculate the mass (m2) of the burning residue.
4.2.5 Expression of results
5 Inspection rules
5.1 The product shall be inspected by the quality inspection department of the production plant, and the products shall not be delivered until the inspection is qualified and a quality certificate is issued. Quality certificate content
Including. manufacturer's name, product name, batch number, product net weight, test results (which should indicate the nitrogen, phosphorus, potassium content and phosphorus basic fertilizer respectively
Name), production date and this standard number.
5.2 The products are inspected by batches, with 1d or 2d output as a batch, and the maximum batch size is 500t.
5.3 When sampling in bags, take samples as specified in Table 2.
5.7 Judgment rule. If one of the indicators in the inspection results does not meet the requirements of this standard, it should be re-sampled from the double number of sampling bags.
If there is still an indicator that does not meet the requirements of this standard, the product in this batch is judged to be unqualified.
6 Packaging, marking, transportation and storage
6.1 Packaging
Products are packed in woven bags lined with polyethylene film bags.
6.2 Signs
The following signs should be noted on the product packaging. product name, trademark, humic acid yield, nitrogen, phosphorus, and potassium content (special fertilizers only indicate nitrogen
Total amount of phosphorus and potassium; if products made from chloride-based fertilizers should indicate chlorine content), net weight, this standard number, production license number, production plant
Name, factory address.
6.3 Transportation
The product should be protected from moisture, sun and rupture during transportation.
6.4 Storage
The product should be stored in a cool and dry place.
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