Wet Chemical Analysis, Positive Material Identification (PMI), Analysis of Paints

Wet Chemical Analysis | Positive Material Identification (PMI) | Analysis of Paints

Wet Chemical Analysis

Wet Chemical Analysis (or Wet chemistry) refers to chemistry done in the liquid phase.
Wet chemistry is utilized at ITS for identifying and quantifying the elements in metals when optical emission spectroscopy and atomic absorption spectroscopy cannot be reliably performed on a sample. One such example would be filings from an old Cast Iron column in an eighty-five year old building. Wet chemical analysis is also performed as a referee method when controversial results from the other techniques are noted.

Wet Chemical Analysis, Positive Material Identification (PMI), Analysis of Paints

Wet chemistry can be performed for coating identification, qualitative chemical measurements like colorimetry (changes in color), other processes like titrimetry and gravimetry. Wet Chemical Analysis could be done to find the following:

  1. Specific gravity
  2. Moisture
  3. Conductivity
  4. pH
  5. Salinity
  6. Density
  7. Viscosity
  8. Cloud point
  9. Concentration
  10. Turbidity

 

Some of the ASTM standards utilized at ITS for performing Wet Chemical analysis are:

    • B 767 - Standard Guide for Determining Mass Per Unit Area of Electrodeposited and Related Coatings by Gravimetric and Other Chemical Analysis Procedure.

    • C 738 - Standard Test Method for Lead and Cadmium Extracted from Glazed ceramic Surfaces.

    • C 1034 - Standard Test Method for Lead and Cadmium Extracted from Glazed Ceramic Cookware.

    • E 34 - Standard Test Methods for Chemical Analysis of Aluminum and Aluminum – Base Alloys.

    • E 53 - Standard Test Methods for Chemical Analysis of Copper in Unalloyed Copper by Gravimetry.

    • E 75 - Standard Test Methods for Chemical Analysis of Copper-Nickel- and Copper-Nickel-Zinc Alloys.

    • E 350 - Standard Test Methods for Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot form and Wrought Iron.

    • E 351 - Standard Test Methods for Chemical Analysis of Cast Iron – All types.

    • E 352 - Standard Test Methods for Chemical Analysis of Tool Steels and Other Similar Medium and High – Alloy Steels.

    • E 353 - Standard Test Methods for Chemical Analysis of Stainless, Heat Resisting, Maraging and Other Similar Chromium – Nickel – Iron Alloys.

    • E 354 - Standard Test Methods for Chemical Analysis of High Temperature, Electrical, Magnetic, and other similar Iron, Nickel, and Cobalt Alloys.

    • E 478 - Standard Test Methods for Chemical Analysis of Copper Alloys.

    • E 536 - Standard Test Methods for Chemical Analysis of Zinc and Zinc Alloys.Standard Test Methods for Chemical Analysis of Zinc and Zinc Alloys.