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hj+491
hj+491, Total:2 items.
In the international standard classification, hj+491 involves: Soil quality. Pedology, Vocabularies.
Professional Standard - Environmental Protection, hj+491
- HJ 491-2009 Soil quality.Determination of total chromium.Flame atomic absorption spectrometry
- HJ 491-2019 Determination of copper, zinc, lead, nickel, chromium in soils and sediments by flame atomic absorption spectrophotometry