Raman spectroscopy in the deep ocean: successes and challenges.
نویسندگان
چکیده
The deep ocean is a demanding environment to the analyst, one that contains fine particles of degraded organic matter and is characterized by high pressures (about 360 atmospheres at 3.6 km depth), low temperatures (down to ;2 8C), and a high concentration (3.5 wt %) of corrosive salts. Such conditions make it difficult to analyze in situ interesting and important geologic materials and dynamic pro-
منابع مشابه
Development of a Laser Raman Spectrometer for Deep-Ocean Science
We have extensively modified and successfully used a laser Raman spectrometer (DORISS, Deep-Ocean Raman In Situ Spectrometer) for geochemical studies in the deep ocean. The initial instrument from Kaiser Optical, was separated into 3 components: an optical head, a laser-power supply-telemetry unit, and the spectrometer. These components were modified to fit into custom designed pressure housing...
متن کاملA Direct Bicarbonate Detection Method Based on a Near-Concentric Cavity-Enhanced Raman Spectroscopy System
Raman spectroscopy has great potential as a tool in a variety of hydrothermal science applications. However, its low sensitivity has limited its use in common sea areas. In this paper, we develop a near-concentric cavity-enhanced Raman spectroscopy system to directly detect bicarbonate in seawater for the first time. With the aid of this near-concentric cavity-enhanced Raman spectroscopy system...
متن کاملروشهای طیف‌سنجی در آنالیز همزمان مواد منفجره
Simultaneous analysis of explosives to identify, determine the purity and eliminate environmental pollution requires rapid, simple and cheap methods. Spectrophotometries method (UV-Vis), high-field proton nuclear magnetic resonance (1H-NMR), Raman spectroscopy and near infrared (NIR) are common methods that are applicable in two ways of direct and indirect in simultaneous analysis. In this poin...
متن کاملLaser Micro-Raman Spectroscopy of CVD Nanocrystalline Diamond Thin Film
Laser micro-Raman spectroscopy is an ideal tool for assessment and characterization of various types of carbon-based materials. Due to its special optical properties (CrN) coated stainless steel substrates. NCD films have been investigated by laser micro-Raman spectroscopy. The fingerprint of diamond based materials is in the spectral region of 1000-1600 cm-1 in the first order of Raman scatter...
متن کاملRaman spectroscopic measurements of synthetic gas hydrates in the ocean
A Raman spectrometer extensively modified for deep ocean use was used to measure synthetic hydrates formed in an ocean environment. This was the first time hydrates formed in the ocean have been measured in situ using Raman spectroscopy. Gas hydrates were formed in situ in the Monterey Bay by pressurizing a Pyrex cell with various gas mixtures. Raman spectra were obtained for sI methane hydrate...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Applied spectroscopy
دوره 58 7 شماره
صفحات -
تاریخ انتشار 2004