LCGC North America-05-01-2004

Product Spotlight
LCGC North America

May 04, 2004

LC Troubleshooting
LCGC North America

May 01, 2004

Sounds simple, but what is required?

In this month's "GC Connections," John Hinshaw reports on new gas chromatography instruments and accessories exhibited at the 55th Pittsburgh Conference.

LCGC North America

April 30, 2004

Short Courses

LCGC North America

April 30, 2004

Calendar

MILESTONES IN CHROMATOGRAPHY
LCGC North America

April 30, 2004

Developments in gas chromatography instrumentation, columns, and performance during the past 10 years.

LCGC North America

April 30, 2004

Peaks of Interest

This article presents a rapid, sensitive, and reproducible HPLC gradient method for the measurement of ginkgolides A, B, C, and J, along with bilobalide, in Ginkgo biloba commercial products.

LCGC North America

April 30, 2004

Web Spotlight

This article establishes the estimation of the uncertainty associated with the chromatographic determination of biogenic amines. The authors identify and estimate each source of uncertainty to establish the accuracy of results and to obtain a better understanding of the method. Thus, measurement uncertainty was split into two sections: uncertainty related to the working conditions, which considers the equipment used, and inherent uncertainty, which includes the chemical stages indicated in the procedure as well as calibration sources, taking into account the existence of the matrix effect. Recovery studies also were made to quantify the contribution of bias to the overall uncertainty. This parameter was calculated for the determination of biogenic amines in different types of samples.