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Nadkarni R.A.K.,Millennium Analytics Inc. | Lane J.L.,Janet L. Lane Consulting
Journal of ASTM International | Year: 2011

A new method using Houillon viscometer for the determination of kinematic viscosity of lubricating oils is described. The results obtained by this method are statistically equivalent to those obtained by other test methods such as ASTM Test Methods D445 or D7042 for such determinations of kinematic viscosity. The precision of the new method is also similar to those of other test methods for determining kinematic viscosity.© 2011 by ASTM International.


Nadkarni R.A.K.,Millennium Analytics Inc. | Hwang J.D.,Chevron
Journal of ASTM International | Year: 2011

Two atomic spectroscopy test methods widely used in the industry for the determination of trace amounts of mercury in crude oils are described and the precision of these methods is compared. Other techniques that are used for such analysis are also reviewed with examples. Copyright © 2011 by ASTM International.


Nadkarni R.A.K.,Millennium Analytics Inc. | Nadkarni R.A.K.,Chevron | Hwang J.D.,Millennium Analytics Inc. | Hwang J.D.,Chevron | And 2 more authors.
Journal of ASTM International | Year: 2011

In addition to the sulfur determined as a part of the crude assay, it is important to know the concentration levels of a number trace elements in crude oils. A method is described for the multielement metal analysis of crude oils using inductively coupled plasma atomic emission spectrometry (ICP-AES). The samples are diluted with an organic solvent before measurements. Metallo-organic compounds dissolved in organic solvents are used as calibration standards. Precision of analysis was established based on an ASTM interlaboratory study. NIST Standard Reference Materials of crude oils where available were analyzed to estimate the bias of the new test method. Copyright © 2011 by ASTM International.


Kishore Nadkarni R.A.,Millennium Analytics Inc. | McKlindon A.,Proficiency
ASTM Special Technical Publication | Year: 2011

Proficiency testing programs (PTPs) play an important role in maintaining the quality of data produced in a laboratory. PTPs are a useful statistical quality assurance (SQA) tools to monitor the strengths and weaknesses of a laboratory's performance. Many laboratory accreditation agencies require laboratory participation in such programs. Two significant PTPs sponsored by American Society for Testing and Materials Committee D02 on Petroleum Products and Lubricants have been the programs on biodiesel and fuel-ethanol that were launched in the past few years. The data obtained from these SQA programs will be presented and analyzed for the lessons learned and the changes that are necessary in these PTP programs and biofuels specifications. Copyright © 2009 by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959.


Nadkarni R.A.K.,Millennium Analytics Inc.
ASTM Special Technical Publication | Year: 2011

For a number of analytical tests required in the biodiesels or ethanol-fuel product specifications, the scope of these test methods does not include such alternative energy sources. Thus, it is not clear that these methods are applicable to biofuels without any modifications to take care of the different matrices. Examples are given where the modifications have been implemented in the test methods and other cases where such research and development work is still required before using the methods for biofuels. Copyright © 2010 by ASTM International,.

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