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纳氏试剂比色法测定水质指标氨氮

氨氮(NH3-N),一般以游离氨(NH3)或铵盐(NH4+)形式存在于水中,两者的组成比取决于水的pH值和水温。当pH值偏高时,游离氨的比例较高。反之,则铵盐的比例高,水温则相反。当水中的氨氮转化为亚硝酸盐,而长期饮用会导致癌变情况,危害生命健康;同时水体中的氨氮含量过高,会对水体造成污染,导致鱼类等死亡,藻类大量繁殖形成水体富营养化。

推荐
产品
雷磁便携式水质分析仪

雷磁便携式水质分析仪

型号:DGB-422

气相色谱法测定水中的亚硝胺

N-亚硝胺是有潜在致癌性的一类化合物,亚硝胺类化合物在食品和烟草中的发现和研究较为广泛,近年来,人们在饮用水,污水处理消毒后的水体以及直接受工业源污染的水体中均发现了亚硝胺的存在。他们是由亚硝化试剂(亚硝酸盐,氮氧化物等)与胺类物质(主要是次级胺类物)反应生成的。近年来在水环境中这类化合物的高检出率引起了人们的广泛关注。前体化合物如亚硝酸盐和有机氮在水中进行亚硝化或氧化反应可以形成N-亚硝胺。

行业应用 | 离子色谱在环保行业中的应用(一)

经测试,采用离子色谱法,盛瀚SH-G-1保护柱和SH-AC-17/11、SH-CC-4、SH-YS-50离子色谱柱,可进行地表水中碘离子的测定,盐碱性土壤中可溶性阳离子的测定,以及油气田水样中阴阳离子的测定。

推荐
产品
阴离子保护柱

阴离子保护柱

型号:SH-AG-1、SH-AG-2、SH-AG-3、SH-AG-4
盛瀚阳离子色谱柱

盛瀚阳离子色谱柱

型号:SH-CC-3、 SH-CC-4

海能仪器:敞口式电位滴定法检测海水的总碱度

总碱度的测定常用敞口式 Gran 滴定法,本文参照此方法步骤,采用碳酸钠溶液模拟海水,旨在探讨 T960 电位滴定仪的总碱度测定上的可行性。

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产品
自动电位滴定仪

自动电位滴定仪

型号:T960

新UV法总氮预制试剂在环保系统的成功应用

广东省某二级城市的环保局,一直以来也是使用国标方法HJ636-201测量各类水样(包括地表水、企业排放口)的总氮。但由于样品量比较多,操作比较繁琐,测量结果的平行性和可靠性也不怎么理想。听闻哈希将要上市一款符合标准方法的预制试剂,该单位立即申请试用 该试剂。

推荐
产品
DRB200 消解器

DRB200 消解器

顶空气质方法检测水中四乙基铅

汽车尾气主要是含铅(Pb)污染和含有CO、SO 2 、NO等有害气体的污染,铅污染是由于汽油添加剂一四乙基铅造成的。我国各大中城市政府已明令规定市区内禁止出售含铅汽油,治理尾气中有毒气体的方法之一是在汽车的排报管上装一个叫做“催化转化剂”(用铂、钯合金作催化剂)的净化装置。它的特点是使CO与NO反应,生成可参与大气生态环境循环的无毒气体,并促使SO 2 的氧化。

推荐
产品
APL奥普乐60位全自动顶空进样器

APL奥普乐60位全自动顶空进样器

型号:HS-Auto60

HS-、SO32-、SO42-及S2O32-同时分析

采用离子色谱法同时测定HS-, SO32-, SO42-和S2O32-,采用Shodex IC SI 90-4E阴离子色谱柱,电导检测器和紫外检测器联用,能够同时分析HS-、SO32-、SO42-和S2O32-。方法简单,且灵敏度和准确度都很高。

推荐
产品
阳离子检测离子色谱仪

阳离子检测离子色谱仪

型号:IC1820
触摸式彩屏电子天平

触摸式彩屏电子天平

型号:AE

水质中百草枯和敌草快含量的测定

安谱实验参考 HJ 914-2017,采用 CNW Athena HILIC (LAEQ-462531)液相色谱柱,并利用 CNW Poly-Sery WCX 小柱(SBEQ-CA2654)来检测水质中百草枯和敌草快的含量。此方法简单,可靠,回收率高且稳定。

推荐
产品

Mars-400 Plus便携式气相色谱-质谱联用仪结合固相微萃取方法现场检测水中的苯胺

本文建立了水中苯胺的固相微萃取-便携式气相色谱-质谱联用仪分析方法。优化了影响苯胺萃取效果的萃取温度、萃取时间、PH值及离子强度。本方法操作简便,分析速度快,可在20分钟内完成从采样到出检测结果的整个分析过程,适合用于水中苯胺的现场检测。

产芝水库水样四种阴离子分析

水库水是重要的地表淡水资源储备,对缓解城市淡水资源紧张起着重要的调节作用。因此水库水质的检测也是环保部门、水利部门、疾控部门开展的一项重要的工作。本次实验采用离子色谱法测定产芝水库水样中的阴离子含量,0.45um滤膜过滤后直接进样。该方法方便、可行,具有较高的可信度。

推荐
产品
智能离子色谱仪

智能离子色谱仪

型号:YC3000型
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