Raw Data on Determination of total carbon in biosolids using MID-infrared spectroscopy

The raw data in the Excel file ‘Nihal et al, 2019 data.xlsx’ includes total carbon (C) results and MID-IR spectra for each of the 392 biosolids samples. The raw data was used to develop a rapid and economical method of determining total C in biosolids using MID-IR spectroscopy. The method was described in a journal article entitled “Determination of total carbon in biosolids using MID-infrared spectroscopy” by Nihal et al., (2020).
The biosolids samples were analysed for total C using a LECO TruMac Series C/N analyser. A sample of 0.5 g of biosolids was weighed into a crucible and combusted at 1300 °C under excess oxygen in the LECO instrument. The combustion of C in excess oxygen resulted in the majority of C converted to CO2. The CO2 was measured using an IR detector, and the C value in the sample was calculated based on the amount of CO2 produced. The instrument was calibrated using a National Institute of Standards and Technology (NIST) certified standard of ethylenediaminetetraacetic acid (EDTA).
The MID-IR spectra of ball mill ground biosolids samples were measured by placing a small sample of approximately 1 g in the sample cup, and the diffuse reflectance spectrum measured from 4000 to 400 cm-1 using a PerkinElmer 100 Fourier transform infrared (FT-IR) instrument with a DRIFT attachment. In all cases, 64 scans were used to measure the MID-IR spectra.

原始数据存储于名为‘Nihal et al., 2019 数据.xlsx’的Excel文件中，其中包含392个生物固体样品的总碳（C）含量结果和中红外光谱数据。该原始数据被用于开发一种快速且经济的生物固体中总碳含量测定方法，该方法通过中红外光谱技术实现。该方法在《使用中红外光谱测定生物固体中总碳》一文中被详细描述，该文由Nihal等人于2020年发表。生物固体样品的总碳含量是通过使用LECO TruMac系列C/N分析仪进行测定的。将0.5克的生物固体样品称重后放入坩埚中，并在LECO仪器中过量氧气的条件下于1300°C进行燃烧。在过量氧气中碳的燃烧导致大部分碳转化为二氧化碳。通过红外检测器测量二氧化碳，并根据产生的二氧化碳量计算样品中的碳含量。仪器使用美国国家标准与技术研究院（NIST）认证的乙二胺四乙酸（EDTA）标准品进行校准。球磨研磨的生物固体样品的中红外光谱是通过将约1克的小样品放入样品杯中，并使用配备DRIFT附件的PerkinElmer 100傅里叶变换红外（FT-IR）仪器，在4000至400 cm-1范围内测量漫反射光谱而获得的。在所有情况下，均使用了64次扫描来测量中红外光谱。