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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by and is under the jurisdiction of the Ministry of Industry and Information Technology of the People's Republic of China.
Limitation requirements of toxic and harmful substance in fertilizers
1 Scope
This standard specifies the limit requirements, test methods and inspection rules for toxic and harmful substance in fertilizers.
This standard is applicable to commercial fertilizers produced by various processes.
2 Normative references
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated reference, the latest edition of the referenced document (including any amendments) applies.
GB/T 2441.2 Determination of urea — Part 2: Biuret content — Spectrophotometric method
GB 5085.1 Identification standards for hazardous wastes — Identification for corrosivity
GB 5085.2 Identification standards for hazardous wastes — Screening test for acute toxicity
GB 5085.3 Identification standards for hazardous wastes — Identification for extraction toxicity
GB 5085.4 Identification standards for hazardous wastes — Identification for ignitability
GB 5085.5 Identification standards for hazardous wastes — Identification for reactivity
GB 5085.6 Identification standards for hazardous wastes — Identification for toxic substance content
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 19524.1 Determination of fecal coliforms in fertilizers
GB/T 19524.2 Determination of mortality of ascarid egg in fertilizers
GB/T 22924 Determination of biuret content for compound fertilizers (complex fertilizers)
GB/T 23349 Determination of arsenic, cadmium, chromium, lead and mercury contents for fertilizers
GB/T 31266 Determination of chloral content for superphosphorate
GB/T 32952 Determination of polycyclic aromatic hydrocarbons content for fertilizers — Gas chromatography-mass spectrometry method
GB/T 35104 Determination of plasticizers (phthalic acid esters) in fertilizer — Gas chromatography-mass spectrometry (GC-MS)
ISO 17318 Fertilizers and soil conditioners — Determination of arsenic, cadmium, chromium, lead and mercury contents
ISO 18643 Fertilizers and soil conditioners — Determination of biuret content of urea-based fertilizers — HPLC method
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
fertilizer
organisms, inorgansms, microorganisms and their mixture which are used to provide, maintain or improve plant nutrition, physical and chemical properties of soil and biological activities, or improve the quality of agricultural products or enhance the stress resistance of plants
3.2
commercial fertilizer
fertilizer sold as commodity
3.3
solid waste
solid and semi-solid articles and substances and gaseous ones in containers that have lost their original use value or have been discarded or abandoned although they have not lost such value in the course of production, people’s daily lives and other activities, as well as articles and substances that are controlled as solid waste, as prescribed by laws and administrative regulations
Note: It is derived from GB 5085.7-2007, 3.1.
3.4
inorganic fertilizer
fertilizer made by extraction, physical and/or chemical industrial methods, with nutrients indicated as inorganic salts
Note: Sulfur, calcium cyanamide, urea and their condensation and association products are traditionally classified as inorganic fertilizers.
[GB/T 6274-2016, Definition 2.1.6]
4 Requirements
4.1 Basic item
Items in Table 1 are basic items (required items), which shall meet the requirements of Table 1 after being tested and judged with the test methods specified in this standard.
Table 1 Limitation requirements of toxic and harmful substance in fertilizers (basic item)
No. Item Content limit
inorganic fertilizer Other fertilizers a
1 Total cadmium ≤10mg/kg ≤3mg/kg
2 Total mercury ≤5mg/kg ≤2mg/kg
3 Total arsenic ≤50mg/kg ≤15mg/kg
4 Total lead ≤200mg/kg ≤50mg/kg
5 Total chromium 500mg/kg ≤150mg/kg
6 Total thallium ≤2.5mg/kg ≤2.5mg/kg
7 Biuret b ≤1.5% ≤1.5%
8 Mortality of ascarid egg —c 95%
9 Number of fecal coliforms —c ≤100/g or ≤100/mL
a For fertilizers other than those inorganic, the content of toxic and harmful substances is calculated by dry basis.
b Biuret are tested and judged only when the total nitrogen content is indicated.
c This index is not required.
4.2 Optional item
Items in Table 2 are optional items. When waste from unknown source is used as raw material for fertilizer and the administrative department deems it necessary, it shall meet the requirements of Table 2 after being tested and judged with the test methods specified in this standard.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Test methods
6 Inspection rules
Annex A (Normative) Terrestrial plant growth test
Annex B (Normative) Determination of total nickel, cobalt, vanadium, antimony and total thallium in fertilizer Inductively coupled plasma atomic emission spectrometry (ICP-AES)
Annex C (Informative) Species for plant testing
Annex D (Informative) Examples of suitable growth conditions for specific species defined in the growth test of terrestrial plants
Bibliography
