Seasonal trends of atmospheric nitrogen dioxide and sulfur dioxide over North Santa Clara, Cuba.

Seasonal trends of atmospheric nitrogen dioxide and sulfur dioxide over North Santa Clara, Cuba.

Environmental monitoring and assessment (2012-12-05)

Daniellys Alejo, Mayra C Morales, Jorge B de la Torre, Ricardo Grau, László Bencs, René Van Grieken, Piet Van Espen, Dismey Sosa, Vladimir Nuñez

PMID23208757

摘要

Atmospheric nitrogen dioxide (NO2) and sulfur dioxide (SO2) levels were monitored simultaneously by means of Radiello passive samplers at six sites of Santa Clara city, Cuba, in the cold and the warm seasons in 2010. The dissolved ionic forms of NO2 and SO2 as nitrate and sulfite plus sulfate, respectively, were determined by means of ion chromatography. Analysis of NO2 as nitrite was also performed by UV-Vis spectrophotometry. For NO2, significant t tests show good agreement between the results of IC and UV-Vis methods. The NO2 and SO2 concentrations peaked in the cold season, while their minimum levels were experienced in the warm season. The pollutant levels do not exceed the maximum allowable limit of the Cuban Standard 39:1999, i.e., 40 μg/m(3) and 50 μg/m(3) for NO2 and SO2, respectively. The lowest pollutant concentrations obtained in the warm season can be attributed to an increase in their removal via precipitation (scavenging) while to the decreased traffic density and industrial emission during the summer holidays (e.g., July and August).

材料

货号

品牌

产品描述

RAD130

radiello^™ 小柱吸附剂, for sampling BTEX and VOCs (CS₂ Desorption), matrix SS net (100 mesh, 5.8 mm diam.), activated with activated charcoal (30-50 mesh), pk of 20

RAD121

radiello ^™ 三角支撑板, pk of 20

RAD165

radiello^™ 小柱吸附剂, for sampling Aldehydes, matrix SS net with 2,4-DNPH coated FLORISIL^®, pk of 20

RAD120

radiello^™ 扩散体外壳, white, configured for general use, pk of 20

RAD168

radiello^™ 小柱吸附剂, for sampling Ammonia (NH₃), matrix microporous PE impregnated with phosphoric acid, pk of 20

RAD1202

radiello^™ 扩散体外壳, yellow, configured for reduced sampling rates, pk of 20

RAD1201

radiello^™ 扩散体外壳, blue, configured for sampling light sensitive compounds, pk of 20

RAD145

radiello^™ 小柱吸附剂, for sampling BTEX and VOCs (thermal desorption), matrix SS net (3 x 8 μm, 4.8 mm diam.), Carbograph, pk of 20

RAD171

Supelco

radiello^™ 亚甲蓝校正标准样，用于 H₂S（硫化氢）, pkg of 100 mL

RAD196

radiello ^™ 室外防护罩, pk of 10

RAD122

radiello^™ 竖直连接头, threaded for standard use, pk of 20

RAD190

radiello^™ 条形码标签, pk of 198

RAD130S

radiello^™ BTEX/VOC Starter试剂盒，CS2解吸

RAD132

radiello^™ 小柱吸附剂, for sampling Anaesthetic Gases/Vapors, matrix SS net with mix of mol sieve and activated charcoal (30-50 mesh), pk of 20

RAD145S

radiello^™ BTEX/VOC 起动包，热解吸

RAD407

Supelco

radiello^™ BTEX 校正套装（热解吸）

RAD174

radiello^™ 过滤套装, pk of 20

RAD170S

radiello^™ Starter试剂盒

RAD1992

radiello^™ 空储存管, polypropylene (with stopper), volume 12 mL, pk of 100

RAD126

Radiello^™ 现场温度计, Includes one standard Radiello vertical adapter (RAD122) for each thermometer, configured for standard use, pk of 3

RAD125

radiello^™ 麻醉气体和蒸气采样器

RAD302

Supelco

radiello^™醛校准标准品, 50 μg/mL each component in acetonitrile, pkg of 10 mL

RAD405

Supelco

radiello^™ BTEX 校正套装（CS₂ 解吸）

RAD1991

radiello^™ 空储存管, glass (with stopper), volume 2.8 mL, pk of 100

RAD141S

radiello^™ 1,3-丁二烯起动包，热解吸, pkg of 1 kit (2 RAD141 adsorbing cartridges and barcode labels, 1 RAD1202 yellow diffusive body, 1 RAD121 triangular support plate, 1 instruction sheet)

RAD195

radiello^™ 夹, suspending Radiello triangular support plate, pk of 20

RAD1203

radiello^™ 扩散体外壳, permeative, configured for anaesthetic gases and vapors, pk of 20

RAD127

Radiello^™ 现场温度计, Reader, pk of 1

RAD198

radiello^™ 固定条备件, for use with Radiello Outdoor Shelter, pk of 100