HHXRF
Definition
Handheld X-ray fluorescence spectrometry: a portable elemental analysis method that detects characteristic X-ray emission from elements in the sample. Used for field screening of lead and chromium in turmeric, with LOD approximately 20 mg/kg for Pb in a pressed pellet; simultaneous Pb+Cr detection is diagnostic for lead-chromate adulteration.
- Full name
- Handheld X-ray fluorescence spectrometry
- Field use
- Screening lead and chromium in turmeric and similar powders
- Approx. LOD
- About 20 mg/kg for Pb in a pressed pellet
- Diagnostic pattern
- Simultaneous Pb and Cr signals indicate lead-chromate adulteration
Common questions
Why does detecting both lead and chromium together matter more than either alone?+
Lead chromate is added to turmeric to intensify its yellow colour, so finding lead and chromium in the same sample at elevated levels points specifically to that adulterant rather than to incidental environmental contamination, which would rarely elevate both elements together.
Can a handheld XRF result be used directly as courtroom-grade quantitative evidence?+
Field HHXRF screening is used to flag suspect samples quickly, but a positive field reading is normally confirmed with a laboratory technique such as ICP-MS or bench XRF before it is relied on for enforcement or prosecution, since portable units trade some accuracy for speed.
Related terms
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- ICP-MS
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- Lead Chromate (PbCrO4)
- Chrome yellow, a synthetic inorganic pigment historically used in industrial paints and road markings. Added to turmeric to intensify the yellow colour;...
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- Sanguinarine
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