HG/T 5050-2016 PDF English
US$295.00 · In stock · Download in 9 secondsHG/T 5050-2016: Alginic acid fertilizer Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| HG/T 5050-2016 | English | 295 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Alginic acid fertilizer
| Valid |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: HG/T 5050-2016
HG/T 5050-2016: Alginic acid fertilizer---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/HGT5050-2016
ICS 65.080
G 21
Record number: 56415-2016
Chemical Industry Standard of the People's
Republic of China
Issued date 2016-10-22 Implementation date:2017-04-01
Issued by Ministry of Industry and Information Technology of the People’s
Republic of China
Alginic Acid Fertilizer
HG
Alginic Acid Fertilizer
1 Scope
This standard specifies the terms and definitions, product types, technical requirements, test
methods, inspection rules, marks, packaging, transport and storage of the alginic acid
fertilizer.
This standard is applicable to the alginic acid fertilizers including coated urea containing
certain amount of alginic acid, bulk blending fertilizer containing alginic acid coated urea,
alginic acid compound fertilizer water-soluble fertilizer containing alginic acid which are
prepared by adding alginic acid synergistic liquid extracted with seaweed as the main raw
material during production process.
2 Normative References
The following files are indispensable to the application of this file. For reference documents
with specified dates, only the version of the specified date applies to this document. For
reference documents with no specified date, their latest versions (including all revisions)
apply to this document.
GB/T 2440 Urea
GB/T 2441.1 Determination of urea-Part 1: Total nitrogen content
GB/T 2441.7 Determination of urea-Part 7: Particle size-Sieve method
GB/T 6682 Water for Analytical Laboratory Use- Specifications and test methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting
values
GB/T 15063 Compound Fertilizer (Complex Fertilizer)
GB 18382 Fertilizer Marking-Presentation and declaration
GB/T 21633 Bulk Blending Fertilizer
HG/T 2843 Chemical Fertilizer Products-Standard volumetric, standard, reagent and
indicator solutions for chemical analysis
HG/T 4365 Water Soluble Fertilizer
NY/T 1116 Fertilizers-Determination of nitrate nitrogen, ammonium nitrogen and amide
nitrogen content
NY/T 1977 Water-soluble fertilizers-Determination of total nitrogen, phosphorus and
potassium content
3 Terms and Definitions
The following are the terms defined in this document
3.1
alginic acid
a polysaccharide that is formed by a linear polymerization of monouronic acid, which is a block
copolymer formed by 1,4 glycosidic bonds using monomers of β-1,4-D-mannuronic acid and
α-1,4-L-guluronic acid
3.2
alginic acid synergist
a fertilizer synergist containing a certain amount of alginic acid and prepared after
extraction with seaweed as a main raw material
3.2.1
alginic powder
a powdered fertilizer synergist containing a certain amount of alginic acid and prepared after
extraction with seaweed as a main raw material
3.2.2
alginic liquid
a liquid fertilizer synergist containing a certain amount of alginic acid and prepared after
extraction with seaweed as a main raw material
3.3
alginic acid fertilizer
a fertilizer containing a certain amount of alginic acid and prepared by adding an alginic
acid synergist in a fertilization process
3.4
alginic acid coated urea
a coated urea containing a certain amount of alginic acid was produced by using a
low-temperature dehydration process and an alginic acid synergist as the main coating material.
Compared with conventional urea, the alginic acid coated urea has a certain slow-release effect
and can reduce a volatilization loss of nitrogen
3.5
bulk blending fertilizer containing alginic acid coated urea
a bulk blending fertilizer containing a certain amount of alginic acid by using alginic acid
coated urea as a part of a nitrogen source and produced by drying blending with other
conventional nitrogen, phosphorus, and potassium granular fertilizers
3.6
alginic acid compound fertilizer
an adding-type or coating-type compound fertilizer containing a certain amount of alginic acid
produced by adding an alginic acid synergist in a compound fertilizer production process.
Compared with conventional compound fertilizers, the alginic acid compound fertilizer has an
effect on reducing an ammonia volatilization loss
3.7
water-soluble fertilizer containing alginic acid
a water-soluble fertilizer containing a certain amount of alginic acid prepared by adding an
alginic acid synergist in a fertilization process
3.8
ammonia volatilization inhibition rate
a functional index that characterizes alginic acid-containing fertilizers to reduce an ammonia
volatilization loss. Under the action of urease and magnesium oxide, ammonia released from
a decomposition of urea is absorbed by a boric acid solution. A ratio of a difference value
between volumes of an alginic acid fertilizer and urea consuming sulfuric acid standard
volumetric solution to the latter is expressed as a percentage
4 Product Types
Including alginic acid coated urea, bulk blending fertilizer containing alginic acid coated
urea, alginic acid compound fertilizer and water-soluble fertilizer containing alginic acid.
5 Requirements
5.1 Appearance
——When the state quality supervision agency puts forward a request for type inspection.
7.2 Batching
Products are inspected in batches. An output of one shift or one day is considered to be one
batch. The maximum batch of alginic acid coated urea does not exceed 1,500 t, the maximum batch
of a bulk blending fertilizer containing alginic acid coated urea and an alginic acid compound
fertilizer is 1,000 t and the maximum batch of a water-soluble fertilizer containing alginic
acid is 100 t. A user regards the products attached with a quality certificate or the received
products as one batch.
7.3 Sampling plan
7.3.1 Alginic acid coated urea: in accordance with the sampling plan of GB/T 2440;
7.3.2 Bulk blending fertilizer containing alginic acid coated urea: in accordance with the
sampling plan of GB/T 21633;
7.3.3 Alginic acid compound fertilizer: in accordance with the sampling plan of GB/T 15063;
7.3.4 Water-soluble fertilizer containing alginic acid: in accordance with the sampling plan
of HG/T4365.
7.4 Sample splitting and sample preparation
7.4.1 Alginic acid coated urea: in accordance with the article of the sample splitting and
sample preparation of GB/T 2440;
7.4.2 Bulk blending fertilizer containing alginic acid coated urea: in accordance with the
article of the sample splitting and sample preparation of GB/T 21633;
7.4.3 Alginic acid compound fertilizer: in accordance with the article of the sample splitting
and sample preparation of GB/T 15063;
7.4.4 Water-soluble fertilizer containing alginic acid: in accordance with the article of the
sample splitting and sample preparation of HG/T 4365.
7.5 Result determination
7.5.1 Whether the items of the product are qualified is determined by "rounding value comparison
method" of GB/T 8170.
7.5.2 When all the type inspection items meet the requirements of this standard, the batch
of products is deemed to be qualified.
Appendix A
(Normative Appendix)
Determination of mass fraction of alginic acid coated urea nitrogen in total
nitrogen of urea-A trichloromethane flotation-nitrogen determination method
A.1 Principle
The density of urea is less than that of trichloromethane, and the density of other nitrogen
fertilizers, phosphate fertilizers and potash fertilizers is higher than that of
trichloromethane, so that the urea can be separated from other fertilizers. Alginic acid coated
urea is significantly different from common urea in appearance, color and film characteristics.
The alginate coated urea and common urea can be separated by visual inspection, their nitrogen
content can be determined separately, and the mass fraction of alginic acid coated urea nitrogen
in total nitrogen of urea can be calculated.
A.2 Reagents and Solutions
Trichloromethane.
A.3 Instruments
Fume hood
A.4 Test Procedure
Weigh 50.00 g of a bulk blending fertilizer containing alginic acid coated urea, which has
been split and mixed evenly and the particles have not adhered, into the 500 mL beaker, add
300 mL of the trichloromethane, shake the beaker to separate the fertilizer particles, then
perform standing still for 5 min-10 min, and when there are no more particles floating, use
the metal screen to collect floating urea particles in an upper layer, place the collected
urea particles inside a fume hood and perform a still-standing ventilation for 10 min or more
to completely volatilize the trichloromethane, after selecting alginic acid coated urea with
specific color and membrane properties, measure ta mass of the alginic acid coated urea (m1)
and a mass of the common urea (m2) respectively, measure the nitrogen content according to
GB/T 2441.1 and mark the nitrogen content as N1 and N2 respectively.
A.5 Expression of Test Procedure
Appendix B
(Normative Appendix)
Determination of mass fraction of alginic acid-A carbazole colorimetry method
B.1 Principle
Alginic acid is hydrolyzed to uronic acid under strong acid conditions and the uronic acid
can form a stable purple-red compound with carbazole. The absorbance is measured with a
spectrophotometer at 520 nm and a mass fraction of the alginic acid in an alginic acid fertilizer
can be calculated.
B.2 Reagents and Solutions
B.2.1 Sulfuric acid;
B.2.2 Anhydrous ethanol;
B.2.3 A sodium alginate [(C6H7NaO6)n] stock solution: 10 mg/mL.
Weigh 10.00 g of sodium alginate, dissolve in water, and dilute to a constant volume of 1 L.
B.2.4 A sodium alginate standard solution: 1 mg/mL.
Pipette 10.00 mL of the sodium alginate stock solution into a 100 mL volumetric flask, and
dilute it to a constant volume to a scale with water.
B.2.5 A carbazole ethanol solution: 2 g/L.
Weigh 0.20 g of carbazole, dissolve with the anhydrous ethanol and dilute to a constant
volume of 100 mL.
B.3 Instruments
B.3.1 Spectrophotometer: an absorption cell with an optical path of 1 cm and conduct a
measurement at a wavelength of 520 nm.
B.3.2 Common laboratory instruments
B.4 Test Procedure
B.4.1 Plotting of standard curve of alginic acid
13
Pipette 0.00 mL, 0.20 mL, 0.40 mL, 0.60 mL, 0.80 mL, 1.00 mL and 1.20 mL of the sodium alginate
standard solution to 50 mL colorimetric tubes, respectively, add 3.00 mL, 2.80 mL, 2.60 mL,
2.40 mL, 2.20 mL, 2.00 mL and 1.80 mL of water to make the volume 3.00 mL, transfer the
colorimetric tubes containing the solutions to an ice-water bath, slowly add 10.00 mL of the
sulfuric acid while shaking, start about one drop per second, after adding half of the acid,
increase to about two drops per second, after the adding, put the colorimetric tubes containing
the solutions in a boiling water bath and heat for 20 min, take the colorimetric tubes containing
the solutions out and cool them to 80°C, then add 0.30 mL of a carbazole ethanol solution,
shake the colorimetric tubes containing the solutions well and place them at room temperature
for 45 min, use a 1 cm absorption cell for colorimetry at a wavelength of 520 nm, use a reagent
blank is used as a reference, measure an absorbance, use mass (mg) of sodium alginate contained
in a standard colorimetric solution of a total color development volume as an x-coordinate,
use the measured absorbance as a y-coordinate, and plot a standard curve or solve a linear
regression equation.
B.4.2 Determination of mass fraction of alginic acid
Weigh 15-20 g (accurate to 0.0002 g) of an alginic acid fertilizer sample that has been split
and mixed evenly in a beaker, add 25 mL of water to dissolve, transfer the dissolved sample
to a 50 mL volumetric flask, dilute to a constant volume, and shake it evenly (if there is
a precipitate, a dry filtration is required). Accurately pipette 3.00 mL of a sample filtrate
into a 50 mL colorimetric tube. The following steps are the same as the plotting of the standard
curve.
B.5 Expression of Test Procedure
Obtain the mass of the alginic acid corresponding to the measured absorbance from the standard
curve or the mass of the alginic acid from the regression equation.
Use formula (B.1) To calculate the content of the alginic acid X in the sample, expressed in
a mass fraction (%):
…………………………(B.1)
in which:
m4——value of the mass of the sodium alginate obtained from the standard curve or the
regression equation, milligram (mg);
15
Appendix C
(Normative Appendix)
Determination of ammonia volatilization inhibition rate-A boric acid
absorption-sulfuric acid titrimetric method
C.1 Principle
Urea is hydrolyzed into ammonium nitrogen under the reaction of urease. In a presence of
magnesium oxide, the ammonium nitrogen produced by a hydrolysis of amide nitrogen in alginic
acid fertilizers will be converted into ammonia to release out, a boric acid solution absorbs
the released ammonia, then a certain concentration of a sulfuric acid solution is used to
titrate the released ammonia, a prepared sample of urea with equal amide nitrogen content is
used as a control, and the ammonia volatilization inhibition rate is calculated on a basis
of a volume of the consumed sulfuric acid standard solution.
C.2 Reagents and Solutions
C.2.1 Urea.
C.2.2 A sulfuric acid standard volumetric solution: =0.01 mol/L.
C.2.3 A urease solution.
Weigh 0.100 g of urease (activity about 1 U/mg), add 0.5 mL of water, grind the urease with
a mortar to a paste, transfer the ground urease to a 250 mL volumetric flask, shake the urease
solution well, and store the urease solution in a refrigerator at 4°C for a standby
application.
C.2.4 A boric acid solution: 2%.
C.2.5 A magnesium oxide suspension: 30g/L.
C.2.6 A mixed indicator.
Dissolve 0.099 g of bromocresol green and 0.066 g of methyl red in 100 mL of ethanol (95%);
C.3 Instruments and Devices
C.3.1 Constant temperature water bath kettle.
C.3.2 Air pump.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of HG/T 5050-2016 be delivered?Answer: The full copy PDF of English version of HG/T 5050-2016 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of HG/T 5050-2016_English with my colleagues?Answer: Yes. The purchased PDF of HG/T 5050-2016_English will be deemed to be sold to your employer/organization who actually paid 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. www.ChineseStandard.us -- HG/T 5050-2016 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. How to buy and download a true PDF of English version of HG/T 5050-2016?A step-by-step guide to download PDF of HG/T 5050-2016_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "HG/T 5050-2016".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|