ECCN.DEV by Cancelli

3A233 Category 3A

Mass spectrometers, capable of measuring ions of 230 u or greater and having a resolution of better than 2 parts in 230, and ion sources therefor, excluding items that are subject to the export licensing authority of the Nuclear Regulatory Commission (see 10 CFR part 110).

Category 3: Electronics

Reasons for control

Country chart

ControlColumn
AT applies to entire entryAT 1
NP applies to entire entryNP 1

List-based license exceptions

ExceptionAs stated in the entry
GBS N/A
LVS N/A

Items

  1. a. Inductively coupled plasma mass spectrometers (ICP/MS);
  2. b. Glow discharge mass spectrometers (GDMS);
  3. c. Thermal ionization mass spectrometers (TIMS);
  4. d. Electron bombardment mass spectrometers having both of the following features:
  5. d.1. A molecular beam inlet system that injects a collimated beam of analyte molecules into a region of the ion source where the molecules are ionized by an electron beam; and
  6. d.2. One or more cold traps that can be cooled to a temperature of 193 K (−80 °C) or less in order to trap analyte molecules that are not ionized by the electron beam;
  7. e. Mass spectrometers equipped with a microfluorination ion source designed for actinides or actinide fluorides.

Related controls

(1) See ECCNs 3E001 (“development” and “production”) and 3E201 (“use”) for technology for items controlled under this entry. (2) Mass spectrometers “specially designed” or prepared for analyzing on-line samples of UF6 gas streams are subject to the export licensing authority of the Nuclear Regulatory Commission (see 10 CFR part 110).

Notes

Technical Notes: 1. ECCN 3A233.d controls mass spectrometers that are typically used for isotopic analysis of UF6 gas samples. 2. Electron bombardment mass spectrometers in ECCN 3A233.d are also known as electron impact mass spectrometers or electron ionization mass spectrometers. 3. In ECCN 3A233.d.2, a “cold trap” is a device that traps gas molecules by condensing or freezing them on cold surfaces. For the purposes of this ECCN, a closed-loop gaseous helium cryogenic vacuum pump is not a cold trap.

Source: eCFR, version 2026-08-01, retrieved 2026-08-20T04:04:59+00:00.