科学家发现大气中羰基硫的来源，人为来源可能比以前认为的更为重要。
The study revealed that anthropogenic sources of carbonyl sulfide are likely to be more important than previously thought.
羰基硫（COS）是大气中最稳定，含量最高的含硫气体。它来自自然和人为来源，对于研究从大气中吸收多少二氧化碳（CO2）植物进行光合作用的科学家至关重要。
Carbonyl sulfide (COS) is the most stable and abundant sulfur-containing gas in the atmosphere. It is derived from both natural and anthropogenic sources and is of key interest to scientists investigating how much carbon dioxide (CO2) plants take out of the atmosphere for photosynthesis.
图片来源：Mindy Takamiya（mindytakamiya.com/）东京工业大学（Tokyo Tech）的研究人员报告说，人为来源的羰基硫（COS）来源不只是海洋来源，还占大气中COS缺失的大部分来源。他们的发现为使用COS动力学估算全球光合作用（吸收CO2）提供了更好的背景。
Researchers at Tokyo Institute of Technology (Tokyo Tech) report that anthropogenic sources of carbonyl sulfide (COS), not just oceanic sources, account for much of the missing source of COS in the atmosphere. Their findings provide better context for estimates of global photosynthesis (taking up CO2) using COS dynamics.
该研究的主要作者Shohei Hattori说：“我们能够基于硫同位素比率将人为和海洋信号分离出来，这真是令人兴奋。“这些测量每次采样至少需要200升空气。我们通过开发新的采样系统克服了这一挑战，并最终成功地测量了大气COS的硫同位素比。”
"It's very exciting that we were able to separate anthropogenic and oceanic signals for COS sources based on sulfur isotope ratios," says Shohei Hattori, the lead author of the study. "These measurements required at least 200 liters of air for each sample measurement. We overcame this challenge by developing a new sampling system, and eventually succeeded in measuring sulfur isotope ratios of the atmospheric COS."
羰基硫是具有线性公式OCS的化合物。通常以COS的形式表示其化学结构，它是一种无色易燃气体，具有难闻的气味。它是由双键连接到硫原子上的羰基组成的线性分子。羰基硫可以被认为是介于二氧化碳和二硫化碳之间的中间体，两者都是等价电子。羰基硫是通过化学合成方法制造的，然后通过蒸馏进行纯化。在MOCVD中用作含硫前驱物。
Carbonyl sulfide is the chemical compound with the linear formula OCS. Normally written as COS as a chemical formula, it is a colourless flammable gas with an unpleasant odor. It is a linear molecule consisting of a carbonyl group double bonded to a sulfur atom. Carbonyl sulphide is manufactured by a chemical synthesis method and then purified by distillation. It is used as a sulfur containing precursor in MOCVD.
作为中国先进的化学材料供应商，上海众巍能够及时提供足够的高纯度羰基硫醚，并根据您的要求定制不同的规格。
As an advanced chemical material supplier in China, Wechem is able to provide sufficient high purity Carbonyl sulfide in a timely manner and also custom different specifications according to your requirements.
以下是上海众巍COS的产品规格：
Below is a specification to Wechem’s COS:
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