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Certified Reference Standards for Environmental Contaminants
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AmXpress
Distributor of Accustandard (Hong Kong)
Phenomenex - authorized to sell by FLM in Hong Kong
Distributor of American Radiolabeled Chemicals
Reseller of Chiron
Reseller of Dr. Ehrenstorfer
Reseller of Witega
Reseller of ISGAS
Information
Background

AmXpress has served customers in China and Hong Kong for 15 years. We provide certified analytical standards and chromatography products to researchers and scientists for accessing the effects of Persistent Organic Pollutants (POP) or Food Safety. We represent Accustandard, Chiron, Dr Ehrenstorfer, Witega, and ISGAS ( Ideal Specialty Gases & Analytical Services).

What is POP?

Persistent organic pollutants are mostly man-made chemicals, that are resistant to environmental degradation. These organic compounds are known to accumulate in human and animal tissues, and therefore could have adverse effects on human health.


Chemicals on the original POP’s list

In May 1995, the UNEP Governing Council had identified twelve categories: Aldrin, Chlordane, DDT, Mirex, Dieldrin, Toxaphene, Endrin, Heptachlor, Polychlorinated biphenyls (PCBs), Hexachlorobenzene, Dioxin, Furans.


RoHS

Restriction of Hazardous Substances Directive (RoHS) 2002/95/EC - a EU directive took effect on July 1, 2006. This directive restricts the use of six categories of hazardous materials in the manufacture of various types of electronic and electrical equipment. It is closely linked with the Waste Electrical and Electronic Equipment Directive (WEEE) 2002/96/EC. The six categories are:

  • Lead
  • Mercury
  • Cadmium
  • Hexavalent chromium (Chromium VI or Cr6+)
  • Polybrominated biphenyls (PBB)
  • Polybrominated diphenyl ether (PBDE)

Special

Specialty Chemicals - in stock

  • 2-methoxy-1-propyl acetate, (CAS# 70657-70-4), neat
  • N-nitrosodibenzylamine (CAS# 5336-53-8), neat
  Current Event - Melamine in our food 三聚氰胺

Recent incident due to melamine-spiked milk product highlights the need of tighter quality control of our food supplies. Please click here for information and analytical products that are essential to the analysis of melamine. Please contact us for details.

  Melamine Analytical Standards
  • d6 -Melamine
  • d6 (aminolabeled) - Melamine
  • d6 -Melamine
  • d6 -Melamine
  • d6 -Melamine
     >>more information

Phenomenex U.S.A. - World Famous in HPLC and GC columns

Beginning July 1st, FLM (Guangzhou) (an exclusive distributor [China & H.K.]) of Phenomenex and AmXpress (partially owned) will promote the Phenomenex products in Hong Kong. Please contact us for their exciting products.

2008 Chiron catalog is now available. Please contact us for a free copy.

Stockholm Convention identified more POPs

There are also a few persistent pollutants that are causing tremendous environmental problems:

  • Brominated flame-retardants
  • Pentachlorobenzene
  • Short-chained chlorinated paraffins
  • Alpha-hexachlorocyclohexane and Beta-hexachlorocyclohexane
  • Lindane
  • Chlordecone
  • PFOS
  • PAHs
  • organometallic compounds such as tributyltin (TBT)
  • Bisphenol A
  • Phthalates

General Information on our provided Certified Reference Standards

A Certificate of Analysis (CoA) and a MSDS are supplied with each standard. Each standard has an assigned expiration date, based upon the known stability characteristics of the product.

Other information, such as chromatogram, and/or MS data might be available. Please inquire.