New tools for atmospheric chemistry: general discussion.
New tools for atmospheric chemistry: general discussion.
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大气化学的新工具：一般性讨论。
DOI：
10.1039/c7fd90041d
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发表时间：
2017
影响因子：
3.4
通讯作者：
Alpert P
中科院分区：
文献类型：
--
作者：
Alpert P
露西·卡彭特 (Lucy Carpenter) 对史蒂文·布朗 (Steven Brown) 的论文进行了一般性讨论：过去十年来，腔增强光谱学取得了哪些进展？未来十年我们可以期待看到什么，从而进一步提高灵敏度和性能？史蒂文·布朗 (Steven Brown) 回应：基于 CES 的波长分辨仪器，可以模拟长光程差分光学吸收光谱 (DOAS) 或遥感仪器的功能，是一种重要的技术。 进步。然而，此类工具的开发已经十多年了，因此代表着持续的进步，而不是真正的新视野。对于我的论文（DOI：10.1039/C7FD00001D）中描述的氮氧化物仪器，其灵敏度几乎可以与最先进的化学发光仪器相媲美。对于 NO、NO2、NOy 和 O3 套件，NOAA CRDS 仪器具有体积小、功耗低、降低真空要求和降低 HazMat 要求的优点。另一个优点是组合仪器还可以在同一套件中测量 NO3 和 N2O5，并使用针对所有测量的痕量气体的单一校准标准。 CRDS 对于这六种痕量气体的缺点包括：(1) 相对于化学发光，NO 的性能降低（通过差值测量），(2) 需要频繁调零的背景漂移，(3) 需要进一步的工作来表征相对于当前化学发光检测器中使用的标准的 NOy 转换方案，以及 (4) NO3 的壁损失。
Lucy Carpenter opened a general discussion of the paper by Steven Brown: What advances in cavity enhanced spectroscopy have been made in the last decade, and what can we expect to see over the next ten years which might improve sensitivity and performance even further?Steven Brown responded: CES based instruments that are wavelength resolved and that can mimic the capabilities of long path differential optical absorption spectroscopy (DOAS) or remote sensing instruments are an important advance. Such instruments are already more than a decade into their development, however, and so represent an ongoing advance rather than a truly new horizon. With respect to the nitrogen oxide instrument described in my paper (DOI: 10.1039/C7FD00001D), the sensitivity is nearly competitive with state of the art chemiluminescence instruments. For the suite of NO, NO2, NOy and O3, the NOAA CRDS instrument has the advantage of small size, low power consumption, reduced vacuum requirements and reduced HazMat requirements. The added advantage is a combined instrument that can also measure NO3 and N2O5 in the same package and with a single calibration standard for all measured trace gases. Disadvantages of CRDS for these six trace gases include:(1) reduced performance for NO, which is measured by difference, relative to chemiluminescence,(2) dri s in the background that require frequent zeroing,(3) further work is required to characterize the NOy conversion scheme relative to the standard currently used in chemiluminescence detectors, and (4) wall loss for NO3.