ISO 18643:2016 PDF
Fertilizers and soil conditioners — Determination of biuret content of urea-based fertilizers — HPLC method
Fertilizers and soil conditioners — Determination of biuret content of urea-based fertilizers — HPLC method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 12
- Дата публикации:
- 18 марта 2016 г.
- Издание:
- ISO IS 18643 edition 1 version 1
- ICS:
- 65.080
ISO 18643:2016 specifies the test procedure for determination of the biuret content in liquid and solid urea-based fertilizers based on the HPLC method.
Abstract
Overview
ISO 18643:2016 specifies a standardized HPLC method for the determination of biuret content in liquid and solid . The method defines sample preparation, reagents, HPLC operating conditions and calculation/reporting rules for quantitative measurement of biuret, a urea-condensation by‑product known to cause plant damage at elevated levels. The standard favors an acetonitrile–water mobile phase for extraction and reversed-phase separation on an , with UV detection.
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