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同一房间两次检测甲醛差5倍 苯差20倍

 

    上周,本报家居版报道了近年来兴起的室内环境检测治理中的种种乱象,引起了读者的浓厚兴趣。市面上的部分检测治理机构怎么操作的?结果怎么样?为此,成都商报记者选择了城西一户新装房业主刘先生的同一间主卧,联系了两家检测机构上门。哪知,得出的结果大相径庭。行业专家表示,检测设备手段的科学性是导致两种数据差距极大的主要原因,消费者在选择室内环境检测治理时,需选择权威公信的企业和机构。

    现场对比:检测方式大不相同

    受检房间是一间约15 的主卧,春节前装修完毕,地面为地砖,室内有四门衣柜、大床加床头柜、梳妆台、飘窗抽屉,墙面全部贴满了墙纸,窗户上有两层窗帘。检测空气污染物为甲醛、苯和TVOC(总挥发性有机物)。

    首先入户检测的是四川省中环博环境检测有限责任公司(以下简称中环博),收费为600元/点位。两名工作人员身着白大褂,佩戴工作证,然后用三脚架支撑起一台仪器,上面插满了试管和胶管,测量完温度湿度,接通电源后开始了15分钟的空气样本采集。“样本要拿回实验室分析,3个工作日后出报告结果。”工作人员表示,这是他们一贯的检测方式,且中环博没有治理项目,如果数据超标业主希望治理,可联系其他机构企业。

    一周后,成都市乾祥环保技术有限公司(简称乾祥环保)的两名工作人员也开始了入户检测,收费为100元/点位,至少要做2个点位才登门。在对主卧的检测中,他们使用的是六合一检测仪,试管插在甲醛采样口,苯和TVOC端口则插了两根温度计模样的玻璃管。10分钟采样结束后,将检测剂倒入采样试管内,颜色开始变绿。工作人员再将试管插入检测仪中,数据很快便现场打印出来。乾祥的工作人员称,“我们也有针对性的室内污染治理,如果需要还可以来做治理。”

    数据出炉:苯数值差高达20倍

    随后,在拿到中环博这份带CMA计量认证章的检测报告后,成都商报记者将两份报告进行了对比。中环博的检测数据为:甲醛:0.02mg/m3、苯:0.002mg/m3、TVOC:0.28mg/m3,没有一项指标污染超标;乾祥环保的数据为:甲醛:0.1 mg/m3、苯:0.04 mg/m3、TVOC:0.44 mg/m3,甲醛污染指标刚达标。

    可以看出,TVOC的数值差距约50%,甲醛数值差距有5倍,苯数值差更高达20倍,且都是乾祥环保的检测数据远远高于中环博的数据。由于数值差异太大,业主刘先生觉得非常奇怪,“一个是带国家计量权威认证的,一个是现场马上出报告的,我到底该相信哪家呢?”他说,自己还有个小孩,如果新房真的污染超标了,他不仅要找家装公司理论,且搬家入住的时间还可能延后。

    业内解析:多合一检测仪难保精确

    针对检测数据的差异,成都室内环境净化治理指导中心主任杨芯分析称,市面上的多合一检测仪,基本上都存在着检测数据不准确的问题。“一是多合一检测仪本身的检测精度存在问题;二是使用该类仪器的治理公司基本不会按照相关规定每年对检测仪进行校对,即使校对也很难保证检测数据的准确性;三是因为利益驱动,可能对多合一检测仪进行人为操作,故意使检测数据偏高,以促使消费者进行治理。”

    而就乾祥环保现场检测的手段来看,业内人士均表示其检测苯和TVOC的方法并不是国家标准的气相色谱法,其数据有20倍差距也就不奇怪了。

 ——————摘自网易财经

    格瑞乐环保表示,对于室内空气质量的检测和治理,在实际操作中都有严格要求,比如检测时对室内空气进行采样的试管,每次使用完毕后,必须用蒸馏水或纯净水清洗。但很多仅是用自来水进行清洗,更有甚者,使用多次才进行清洗。

 

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格瑞乐环保室内(车内)空气污染防治专家,武汉除甲醛、武汉甲醛治理、室内空气净化、新车除异味。

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点击次数:1208  更新时间:2015-03-20
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