【摘要】：針對偏遠(yuǎn)地區(qū)水環(huán)境評價(jià)時(shí)水樣的采集、運(yùn)輸、保存等難以滿足國標(biāo)法中的要求,以CODCr、TP、氟化物等為研究指標(biāo),在實(shí)驗(yàn)室內(nèi)對樣品保存環(huán)境、運(yùn)輸條件、檢測時(shí)間等各影響因素進(jìn)行模擬評估試驗(yàn),探索有效的技術(shù)方案。研究表明,在調(diào)p H2和4℃靜置保存1 d的條件下,國標(biāo)法和便攜儀器法對CODCr的測試結(jié)果保持一致,若因條件限制無法4℃保存,可在調(diào)p H2和常溫靜置保存1 d,用便攜儀器也基本滿足測試要求。總磷測試需對水樣現(xiàn)場加酸處理,常溫保存運(yùn)回檢測地24h內(nèi)完成測試,遠(yuǎn)距離運(yùn)輸保存時(shí)間不要超過3 d,運(yùn)輸過程中搖動(dòng)以及短暫的升溫對總磷含量影響不大。氟化物的測試可在采樣后不調(diào)p H常溫保存兩周內(nèi)完成測試。另外,研究發(fā)現(xiàn),便攜式儀器法測成分復(fù)雜的水樣時(shí)局限性較大。
[Abstract]:The collection, transportation and preservation of water samples in remote area water environment assessment are difficult to meet the requirements of the national standard method. Taking CODCr-TPand fluoride as the research index, the sample preservation environment and transportation conditions are studied in the laboratory. The test time and other influencing factors were simulated and evaluated to explore the effective technical scheme. The results show that under the condition of adjusting pH 2 and storing at 4 鈩，

本文編號：2160950