APPLICATION
Water is the source of life, and as the blood of the ecosystem, it is the basis of human survival, production and life, and sufficient and high-quality water resources are the primary condition for the healthy cycle of the ecosystem. However, water resources are very vulnerable to pollution, especially some inland water bodies, due to the natural confinement of its pollution problem is more prominent, while water resources as a carrier of pollutants, with dynamic diffusion and spread characteristics, will further aggravate the degree of pollution of water bodies. There are many oceans and lakes in China, along with the rapid development of the economy and the enhancement of human activities, the problem of water quality pollution in oceans and lakes has become increasingly serious. It has become a key factor limiting the sustainable development of cities, so it is necessary to use high-tech means to carry out research on water quality pollution in oceans and lakes, to provide timely and rapid water quality conditions in oceans and lakes, to protect people's normal production and life.
Raman spectrum is the fingerprint spectrum of molecular vibration. Different material molecules have different vibration frequency, so it is often used as an important basis for material identification. It has the advantages of simple operation, high sensitivity and good repeatability. In this paper, through the Raman spectrometer quantitative analysis of silica dust samples, through the experiment to prove the feasibility of its application in the field of analysis of dust.
隨著吸煙人口的不斷增長,與香煙有關(guān)的各類物證出現(xiàn)在刑事案件現(xiàn)場的比例逐步提高,進行香煙品牌和來源的分析,對鎖定偵查范圍、有效打擊犯罪變得尤為重要,現(xiàn)階段已經(jīng)對香煙煙蒂、煙灰、煙絲、香煙盒外包裝薄膜、煙用內(nèi)襯紙等進行了多項研究并取得了一定的成果。香煙盒外包裝薄膜即卷煙小盒及條盒外包裹的一層薄膜,全世界有85%以上的煙盒采用透明包裝材料進行包裝。因其具有阻隔性、透明性、熱封性、機械加工性、透氧透濕率小等特性,能有效防止香煙吸潮霉變,阻止煙草香氣外逸,具有良好的阻隔性和保香性。[1]
隨著社會與經(jīng)濟的發(fā)展,環(huán)境污染越來越成為困繞著人類健康和制約社會繼續(xù)發(fā)展的嚴峻問題,多環(huán)芳烴類污染物,在環(huán)境中具有長期穩(wěn)定性、可遷徙性以及生物富集性,能干擾生物內(nèi)分泌系統(tǒng),損壞生物的神經(jīng)系統(tǒng),潛在的致癌作用[1-3]。表面增強拉曼光譜(Surface enhanced Raman spectroscopy, SERS)作為一種強有力的原位分析技術(shù),不僅可以像拉曼光譜一樣能夠提供分子結(jié)構(gòu)的特征光譜,而且還可以極大地增強被測分子的拉曼信號,通??梢栽鰪?個數(shù)量級以上,有時甚至可以達到14個數(shù)量級,從而達到單分子檢測。文獻研究表明表面增強拉曼光譜完全可以實現(xiàn)對特定環(huán)境污染物的高靈敏度定性和定量檢測。過去受限于拉曼光譜儀的發(fā)展,表面增強拉曼光譜基本上只能作為一種實驗室技術(shù)。隨著激光器技術(shù)、光纖技術(shù)以及CCD檢測技術(shù)的發(fā)展,拉曼光譜儀可以集成為一個小型、快速、簡便的檢測設(shè)備,進而使拉曼光譜儀應(yīng)用于多環(huán)芳烴快速分析領(lǐng)域成為可能[4-11]。
盡管歐盟和美國的新法規(guī)要求航行在歐洲和美國沿海的船舶使用低硫航油,但由于執(zhí)法難度大,違規(guī)風險小,在經(jīng)濟利益的驅(qū)動下,便宜的、高硫的燃料仍被許多輪船違法使用。然而,新技術(shù)的發(fā)展將改變這一現(xiàn)象。基于一對Andor紫外光譜儀構(gòu)建的實時空中污染檢測系統(tǒng)能夠以每小時20艘的速度實時監(jiān)控船舶污染。