Conventional beta counting technique based radiocarbon dating facility at Birbal Sahni Institute of Palaeosciences- Lucknow was established in 1974 (Rajagopalan,1978). In 2017-18, BSIP received an upgrade with installation of an Automated Graphitization Equipment (AGE) coupled with an Elemental Analyser, a Carbonate Handling System (CHS) along with an in-line stable isotope mass-spectrometer (IRMS). Using this combo, stable Carbon (C), Nitrogen (N) and Sulfur (S) isotopic measurements could be carried out in both organic and inorganic type samples followed by graphite preparation (~1 mg) for 14C measurement by Accelerator Mass Spectrometry (AMS). This communication addresses details of pre-processing, processing, and quality checks adopted for achieving acceptable and demonstrable accuracy and precision of measured Δ14C, δ13C, δ15N, and δ34S measurements. Information regarding chemical preparation of samples for aforesaid stable and radio isotopic analysis is provided in succinct manner. Overall, average coefficient of variation determining precision of our graphite powders for 14C measurements is ~2.4%. The mean age of blank (anthracite) processed using established EA-IRMS-AGE unit comes as 42,100 ± 300 years.

中文翻译：

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在印度勒克瑙的Birbal Sahni古科学研究所使用新型自动石墨制备实验室结合稳定同位素质谱法进行放射性碳测量。

1974年在拉克瑙的Birbal Sahni古科学研究所建立了基于常规β计数技术的放射性碳测年设施（Rajagopalan，1978）。在2017-18年度，BSIP进行了升级，安装了自动石墨化设备（AGE），元素分析仪，碳酸盐处理系统（CHS）以及在线稳定同位素质谱仪（IRMS）。使用此组合，可以在有机和无机类型的样品中进行稳定的碳（C），氮（N）和硫（S）同位素测量，然后制备石墨（〜1 mg），用于通过加速器质谱（AMS）进行14C测量。 ）。该通讯介绍了为获得可接受的和可证明的Δ14C，δ13C，δ15N，和δ34S测量值。以简洁的方式提供了有关用于上述稳定和放射性同位素分析的样品化学制备的信息。总体而言，我们用于14C测量的石墨粉的平均变异系数确定精度为〜2.4％。使用已建立的EA-IRMS-AGE装置加工的坯料（无烟煤）的平均年龄为42,100±300年。