Standard: API 27-30840

THE INFLUENCE OF TRACE METALS IN DISPERSE AEROSOLS ON THE HUMAN BODY BURDEN OF TRACE METALS

This standard is available for individual purchase.

or unlock this standard with a subscription to IHS Standards Expert

IHS Standards Expert subscription, simplifies and expedites the process for finding and managing standards by giving you access to standards from over 370 standards developing organizations (SDOs).

FEATURES & BENEFITS
  • Maximize product development and R&D with direct access to over 1.6 million standards
  • Discover new markets: Identify unmet needs and discover next-generation technologies
  • Improve quality by leveraging consistent standards to meet customer and market requirements
  • Minimize risk: Mitigate liability and better understand compliance regulations
  • Boost efficiency: Speed up research, capture and reuse expertise
For additional product information, visit the IHS Standards Expert page.

HOW TO SUBSCRIBE
For more information or a custom quote, visit the IHS Contact Us page for regional contact information.
Scope:

INTRODUCTION

Trace metals have been studied by numerous investigators both in ambient air and in human tissues. While there is evidence that exposure to particulate pollutants can cause deleterious health effects (Goldsmith and Friberg, 1977), there has been little effort to relate the tissue concentrations of trace metals to sources of inhalation exposure. In this study relationships were determined between the concentrations of specific trace metals in aerosols and the concentrations of trace metals in human tissues.

To adequately determine an index exposure of particulate pollutants in air, a knowledge of the size distribution and concentration of the various components is necessary

A review of the literature in Chapter II reveals that short sampling periods and small samples are characteristic of many currently available size selective samplers. The use of such samplers for determining size-mass distributions for suspended particulates or trace metals is generally unsatisfactory when long-term averages are desired.

To overcome the limitations of available samplers and obtain information about the particle size spectrum of total suspended particulates and trace metals in the urban aerosol, a size selective particle sampler has been developed for continuous sampling of the urban aerosol over periods ranging from hours to weeks. The system used a parallel array of four two-stage samplers with cyclone first stage collectors. Undersize particles which pass through the cyclones are captured on glass fiber filters. To ensure representative sampling, an inlet system was designed to obtain equal intake velocities and an electronic feedback control system was developed to maintain constant flow through the cyclone within 2% over the entire sampling period. These and other innovations permitted mass balances to be obtained

Organization: American Petroleum Institute
Document Number: api 27-30840
Publish Date: 1977-10-01
Page Count: 333
Available Languages: EN
DOD Adopted: NO
ANSI Approved: NO
Most Recent Revision: YES
Current Version: NO
Status: Inactive
Advertisement
Advertisement
Advertisement
Advertisement