环境水(除海水)中其他检测

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标准解读

环境水中有机污染物检测方案

根据自来水法修改(水质标准相关省令「2003年5月30日厚生劳动省令第101 号」),水质标准新追加项目中有非离子界面活性剂。作为界面活性剂之一的非离子界面活性剂一般用做清洗剂、乳化剂。固相萃取−吸光光度法作为公定法(厚生劳动大臣基于水质标准相关省令规定指定的方法「2003年7月22日厚生劳动省告示第261号」)收录在非离子界面活性剂的分析方法中,分析的前处理采用固相萃取。固相萃取这种前处理手法非常频繁地应用在液体色谱法、气相色谱质谱联用分析法等的样品前处理中,用于去除干扰成分、低浓度成分浓缩等目的。 在此,使用在硅胶上化学键合十八烷基的市售固相色谱柱实施了固相萃取。将从固相色谱柱萃取的试验溶液,按照图1.39.2的步骤,分析了其中的非离子界面活性剂。将不同浓度(0.005 ~0.04 mg/L)的非离子界面活性剂标准液采集到量瓶中,分别加入精制水定容至1000 mL,作为用于工作曲线的标准样品。对于此标准样品,进行与实际样品………… 纳锘仪器 做为岛津公司上海地区授权代理商,向您提供全方位的服务, 如欲了解更多该产品信息,可来电咨询 021-61610135 ---------------------------------------------------------------------------  上海纳锘仪器有限公司  地址:上海市莲花南路1388弄8号楼碧恒广场1503室[201108]  电话:021-60900829,60900830,61131031,61131051  传真:021-61131052  E-Mail:info@nano-instru.com
检测样品: 环境水(除海水)
检测项: 其他

上海纳锘实业有限公司

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海冰形成过程中氧动力学检测方案(氧分析仪)

在海冰形成的过程中将光学微氧传感器(Micro-optodes)冻结在冰中,直接测量其中的氧动力状态。 Oxygen micro-optodes were used to measure oxygen dynamics directly within the microstructure of sea ice by freezing the sensors into the ice during its formation.The experiment was conducted in a 4 m3 mesocosm filled with artificial seawater and inoculated with a unialgal culture of the common Antarctic ice diatom Fragilariopsis cylindrus (Bacillariophyceae) to a final chlorophyll a (chl a) concentration of 11 μg l–1. Ice growth was initiated 7 d after inoculation by reducing the air temperature to –10 ± 2°C and terminated 17 d later. The final ice thickness was 27 cm. One optode was frozen into grease ice and 2 others into the skeletal layer of the growing ice sheet. Increasing oxygen concentrations during ice crystal formation at the water surface and the ice-water interface revealed a strong inclusion of oxygen, which was either physically trapped and/or the result of photosynthesising diatoms. The major portion of oxygen was present as gas bubbles due to supersaturation as a result of increasing salinity and oxygen production by diatoms. An increase in salinity due to a concurrent decrease in ice temperatures during subsequent sea ice development reduced the maximum concentration of dissolved oxygen within brine. Thus, dissolved oxygen concentrations decreased over time, whereas gaseous oxygen was released to the atmosphere and seawater. The sensors are a significant advance on more conventional microelectrodes, because the recordings can be temperature and salinity compensated in order to obtain precise measurements of oxygen dynamics with regard to total (dissolved and gaseous) and dissolved oxygen in sea ice. Optodes do not consume oxygen during measurement over a long period under extreme conditions, which is another advantage for long-term deployment in the field.
检测样品: 环境水(除海水)
检测项: 其他

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仪器信息网行业应用栏目为您提供85篇环境水(除海水)检测方案,可分别用于物理指标检测、营养盐检测、有机污染物检测、有机物综合指标检测、(类)金属及其化合物检测、无机阴离子检测、生物检测、颗粒物检测、其他检测、生态检测、放射性检测、感官性状和物理指标检测、消毒剂检测、酸沉降检测、综合检测、微塑料检测,参考标准主要有《HJ 1004-2018环境空气降水中有机酸(乙酸、甲酸和草酸)的测定离子色谱法》等