Số hiệu tiêu chuẩn
ISO 4221
Tên tiêu chuẩn
Air quality; Determination of mass concentration of sulphur dioxide in ambient air; Thorin spectrophotometric method
Ngày phát hành
1980-11-00
Tiêu chuẩn tương đương
DIN EN 12720 (1997-10), MOD * DIN ISO 4221 (1990-05), IDT * DIN ISO 4221 (1987-01), IDT * BS 1747-7 (1983-01-31), IDT * NF X43-013 (1977-12-01), IDT * SN EN 12720 (1998), MOD * PN-ISO 4221 (1994-12-30), IDT * UNE 77203 (1993-05-19), IDT * ELOT 689 (1986), IDT * SFS 3864 (1977), MOD * STN ISO 4221 (1995-09-01), IDT * CSN ISO 4221 (1994-03-01), IDT
Từ khóa
Air * Air pollution * Air purification * Air quality * Analysis * Atmosphere * Chemical analysis and testing * Consistency (mechanical property) * Determination of content * Gas analysis * Gases * Measurement * Pollution control * Spectrochemical analysis * Spectrophotometry * Sulphur dioxide * Test equipment * Testing * Sulphur compounds * Mass concentration * Pollution of the air * Thorin