硝酸盐氮的测定 (紫外分光光度法)
Determination of nitrogen(nitrate) (Ultraviolet spectrophtometric method)

1995-05-01

水质 硝酸盐氮的测定 紫外分光光度法（试行）
Water quality-Determination of nitrate-nitrogen-Ultraviolet spectrophotometry

2007-03-10

固定污染源排气中氮氧化物的测定 紫外分光光度法
Stationary source emission—Determination of nitrogen oxide—Ultraviolet spectrophotometric method

1999-08-18

토양의 질－공기 건조 토양에서 염화칼슘용액으로 추출한 질산성 질소, 암모니아성 질소 및 총 가용성 질소 측정 방법
土壤质量用氯化钙溶液作萃取剂测定风干土壤中硝态氮、铵态氮和总可溶性氮

2009-12-18

토양의 질－공기 건조 토양에서 염화칼슘용액으로 추출한 질산성 질소, 암모니아성 질소 및 총 가용성 질소 측정 방법
土壤质量.用氯化钙溶液作萃取剂测定空气干燥土壤中的硝酸盐氮、铵态氮和总可溶性氮

2009-12-18

SOIL QUALITY. DETERMINATION OF NITRATE NITROGEN, AMMONIUM NITROGEN AND TOTAL SOLUBLE NITROGEN IN AIR-DRY SOIL USING CALCIUM CHLORIDE SOLUTION AS EXTRACTANT.
土壤质量 以氯化钙溶液为萃取剂测定风干土壤中的硝态氮、铵态氮和可溶性总氮

1999-05-26

Soil quality — Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
土壤质量——氯化钙溶液萃取法测定风干土壤中硝态氮、铵态氮和可溶性总氮

1998-04-23

Soil quality - Determination of mineral nitrogen (nitrat and ammonium) in soil profiles (Nmin laboratory method)
土壤质量.土壤剖面中矿质氮（硝酸盐和铵）的测定（Nmin实验室法）

2005-06-01

土壤质量 总砷的测定 硼氢化钾-硝酸银分光光度法
Soil quality--Determination of total arsenic--Spectrophotometric method with potassium borohyride andsilver nitrate

1997-12-08

Soil quality - Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant (ISO 14255:1998)
土壤质量.用氯化钙溶液作为萃取剂测定风干土壤中的硝酸盐氮、铵态氮和总可溶性氮（ISO 14255-1998）

1998-11-01