GB/T 37500-2019 in English
VALIDDetermination of plant growth regulators in fertilizer—High performance liquid chromatography
- Issued on:2019-06-04
- Implemented on:2020-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$175.00
《GB/T 37500-2019肥料中植物生长调节剂的测定 高效液相色谱法》由TC105（全国肥料和土壤调理剂标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
Introduction
1. Background and significance of standard formulation
GB/T 37500—2019 "Determination of plant growth regulators in fertilizers - High performance liquid chromatography" is an important standard in China for the detection of plant growth regulators in fertilizers. With the development of modern agriculture, plant growth regulators are increasingly used in agricultural production, and their rational use is of great significance to increasing crop yields and improving quality. However, excessive or improper use may bring environmental and food safety risks, so it is particularly important to establish a scientific and accurate detection method.
2. Comparative analysis of standard frameworks
| Standard dimensions | GB/T 37500—2019 | International comparison (such as ISO) | Other relevant domestic standards |
|---|---|---|---|
| Scope of application | Water-soluble fertilizers, compound fertilizers, etc. | Mainly for the detection of plant growth regulator residues | Local standards vary greatly |
| Detection method | High performance liquid chromatography (HPLC) | Gas chromatography, LC-MS coupling | Enzyme-linked immunosorbent assay, etc. |
| Detection indicators | 10 plant growth regulators (such as 2,4-D, indoleacetic acid, etc.) | Focus on environmental hormone substances | Cover some pesticide residue detection |
3. Implementation suggestions and precautions
Laboratory conditions requirements:
- Equipped with high performance liquid chromatography (HPLC) and diode array detector.
- Analysts must have professional knowledge and operating experience in related fields.
- Ensure that the laboratory environment meets safety and health regulations.
Key points of sample pretreatment:
- Solid samples must be crushed to less than 0.5mm.
- Liquid samples must be fully mixed and weighed.
- Select methanol or acetonitrile that matches the experimental conditions as the extraction agent.
Notes on result calculation:
- The background value must be subtracted from the blank test result.
- The relative deviation of the parallel determination results shall not exceed 10%.
- Sodium nitrophenolate is calculated as the sum of the three components.
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