Committee I.vp - AOAC International

80B METHODS COMMITTEE REPORTS:JOURNAL OF AOAC INTERNATIONAL VOL. 90, NO. 1, 2007
METHODS COMMITTEE REPORTS
Committee on Feeds, Fertilizers, and Related Agricultural Topics
LUANN WETZLER,CHAIR
Nebraska Department of Agriculture, 3703 S. 14th St,
Lincoln, NE 68502
NANCY THIEX,SECRETARY
South Dakota University, Olson Biochemistry
Laboratories, Box 2170 SAS 136A, Brookings, SD 57007
SARA WILLIAMS,SAFETY ADVISOR
Office of the Texas State Chemist, PO Box 3160, Ross and
Ireland Sts, 307 Reed McDonald Bldg, College Station, TX
77804
JOHN G. PHILLIPS,STATISTICAL ADVISOR
U.S. Department of Agriculture, Agriculture Research
Service, Eastern Regional Research Center, 600 E.
Mermaid Ln, Windmoor, PA 19038
DARYL S. PAULSON,STATISTICAL ADVISOR
Bioscience Laboratories, Inc., 300 N. Wilson Ave, Suite 1,
Bozeman, MT 59715
MICHAEL P. CARLSON
University of Nebraska-Lincoln, 145 Veterinary Diagnostic
Center, Fair St and E, Campus Loop, Lincoln, NE 68583
MARY G. LEADBETTER
U.S. Food and Drug Administration, Center for Veterinary
Medicine, HFV-143, Rm 337, 7500 Standish Pl, Rockville,
MD 20855
JOHN DENNIS MCCURDY
U.S. Food and Drug Administration, 3949 Sugarloaf Dr,
Monrovia, MD 21770
JAMES MACNEIL
Canadian Food Inspection Agency, 116 Veterinary Rd,
Saskatoon, SK S7N-2R3, Canada
DAVE MERTENS
U.S. Department of Agriculture, Fiber Utilization Laboratory,
Room 261, 1925 Linden Dr W., Madison, WI 53706
RODNEY J. NOEL
Office of the Indiana State Chemist, Purdue University,
1154 Biochemistry Bldg, West Lafayette, IN 47907
Committee Actions
Two collaborative studies have been successfully
completed, 2 studies are in progress, and 1 new protocol has
been received and is in review. OMA-2004-Jul-012
Monensin, Narasin, and Salinomycin, LC Method received
First Action approval as AOAC Method 2006.01.
OMA-2004-Nov-023 Arsenic, Cadmium, Cobalt, Chromium,
Lead, Molybdenum, Nickel, and Selenium in Fertilizer by
Microwave Digestion and ICP-OES Detection was approved
as AOAC Method 2006.03. Protocols for
OMA-2004-Oct-017 Oxytetracycline, LC Method and
OMA-2005-Jan-002 Lasalocid were approved and studies are
underway. Three topics have been recommended to be
discontinued. OMA-2006-Jun-050 Determination of
Decoquinate in Feeds by Liquid Chromatography has been
received and the protocol has been approved. A study titled
“Sampling of Fertilizer Materials and Blends from Bulk Bags
Designed to Hold Approximately 1 Ton of Material: Bag
Probing Technique Compared to AOAC Fertilizer Stream
Cutting Technique” has been received and is under
Committee review. 982.01 Boron in Fertilizers has undergone
revision to incorporate a method modification.
OMA Chapter 5, Section 5.1.02: As part of the revision of
this chapter, the Committee recommends a revision of AOAC
Official Method 950.02, Preparation of Test Sample, to
provide additional and current information and to make it
consistent with the same method in Section 4.1.02 of
Chapter 4. The proposed wording is: Reduce particle size of
laboratory sample selecting a method, which minimizes loss
of moisture and maintains integrity of constituents of
analytical interest. For feeds containing heat-sensitive
analytes, grind to pass 2.0 mm sieve; for other feeds grind to
pass 1.0 mm sieve. Store the analytical sample under
conditions that minimize degradation of components and
exposure to the atmosphere.
The driving force for new methods entering the
collaborative study process in the past year continues to be the
Agricultural Materials Community and its subgroups. A
summary of the activities of the Community is available on the
AOAC Website at http://www.aoac.org/Ag_Materials/
community.htm. Information on the Fertilizer Subgroup is
available at http://www.aoac.org/Ag_Materials/fertilizer/
mission.htm and information on the Feed Additives and
Contaminants Subgroup is available at http://www.aoac.org/
Ag_Materials/additives/main.htm.
Antibiotics in Feeds, Hussein Ragheb
No reports regarding analysis of antibiotics in animal feeds
were received from any of the Study Directors. There was no
indication of any specific problems in the microbiological
assays.
Research activities continued in the General Referee
laboratory. The emphasis was to study the turbidimetric
analysis of chlortetracycline in feeds. In 1977, the

turbidimetric method was developed by our laboratory. It was
approved First Action by AOAC, and Final Action in 1996
(977.37) for feed supplements containing more than (or equal
to) 22 g/kg. It was not approved for complete feeds.
We concentrated our efforts on studies of all factors
influencing the growth of the test organism (S. aureus). In
1980, Chiang reported that Mg ions in feed extracts inhibited
ctc activity [JAOAC (1982) 65, 1044–1047]. We conducted
experiments where magnesium sulfate was added to the
turbidimetric assay media. We reasoned that the presence of
magnesium ions will affect growth response to standard and
sample solutions in the same manner. Four blank feeds
(2 cattle, 1 swine, and 1 poultry) were used in standard
addition experiments. Results of the turbidimetric assay were
negatively biased as compared with the plate assay (967.39).
The negative bias increased as the theoretical label potency
decreased (samples extracts more dilute with higher potency
feeds). Furthermore, ctc recovery was poor (about 60%) by
the plate and turbidimetric method for theoretical potency of
5 mg/kg. When the standard reference solutions were
prepared in any of these blank feeds at 1/50 dilutions,
recoveries were good and comparable by both turbidimetric
and plate methods even at theoretical potency of 25 mg/kg.
There were no significant differences in antibiotic recovery
regardless of the type of blank feed used in standard addition
experiments or the method of determination (plate of
turbidity).
However, the use of blank feeds is unacceptable because of
the wide variability of the composition of feeds. This could
lead to errors in estimation of potency. We will continue to
investigate this problem or ctc-HCl determination by the
turbidimetric method especially for low level feeds.
Drugs in Feeds, Harold Campbell
(1) Amprolium, LC Method.—Topic Advisor Fred
Armstrong, Canadian Food Inspection Agency, Ottawa
Laboratory (Carling), Bldg 22, Central Experimental Farm,
960 Carling Ave, Ottawa, ON K1A 0C6, Canada, Tel:
613-759-1299, Fax: 613-759-1260, E-mail:
farmstrong@inspection.gc.ca. The Topic Advisor reports no
progress. There were no publications in 2006 on the
determination of amprolium.
(2) Carbadox.—Topic Advisor Alexander MacDonald,
Pharma Science, Inc., 16 Cypress Ave, North Caldwell, NJ
07006, Tel: 973-228-2392, Fax: 973-228-3498, E-mail:
BeeMac201@aol.com. No activity was reported regarding the
study of an LC method based on the method of Aerts and
Werdmuller [J. Assoc. Off. Anal. Chem. (1988) 71, 484–489].
(3) Chlortetracycline, LC Method.—Topic Advisor
Richard Larson, South Dakota State University, ASC 133, PO
Box 2170, Brookings, SD 57007-1217, Tel: 605-688-6706,
Fax: 605-688-6295, E-mail: Richard.Larson@sdstate.edu.
Work continues on optimizing the method of Houglum and
Larson [J. AOAC Int. (1997) 80, 961–965]. A problem
experienced by some other laboratories of mobile phase over
pressuring appears to be related to insolubility of the EDTA as
the mobile phase gradient approaches 60% methanol. Another
METHODS COMMITTEE REPORTS:JOURNAL OF AOAC INTERNATIONAL VOL. 90, NO. 1, 2007 81B
laboratory working with the method suggested reducing the
EDTA concentration of the mobile phase buffer from 20 to
5 mM. A Study Director has been identified and is beginning a
single-laboratory validation (SLV) using this modification to
the method. A collaborative study is anticipated pending the
outcome of the SLV.
(4) Decoquinate, LC Method.—Study Director Anivis
Sanchez, Canadian Food Inspection Agency, Ottawa
Laboratory (Carling), Bldg 22, Central Experimental Farm,
960 Carling Ave, Ottawa, ON K1A 0C6, Canada, Tel:
613-759-1298, Fax: 613-759-1260, E-mail:
Sanchezaa@inspection.gc.ca. The collaborative study of an
LC method of analysis of decoquinate in feeds and mineral
premixes has been approved by the Feed Additives and
Contaminants Subgroup of the Agricultural Materials
Community. Information will be posted on the AOAC
Website. The interlaboratory study is being planned for late
2006 or early 2007.
(5) Ivermectin.—Method Advisor James A. Whitehead,
Merial Ltd., 3360 Maury Ave, St. Louis, MO 63116, Tel:
314-752-8053, Fax: 314-752-8061. The current Peer-Verified
Method and interlaboratory study information is published,
(1994) J. AOAC Int. 77, 1353–1358.
(6) Lasalocid.—Study Director Charles L. Focht,
Nebraska Department of Agriculture, 3703 S. 14th St,
Lincoln, NE 68502-5399, Tel: 402-471-2176, Fax:
402-471-0091, E-mail: cfocht@agr.ne.gov. A collaborative
study was conducted in September–October 2005, using
8 samples in blind duplicate covering a range of guarantees
from the premix level (68 g/lb) to finished feed level (30 g/T).
In addition, 2 sample pairs contaminated at the residue level
were included as a component for residue testing. The sample
materials were sent to 20 laboratories, and 17 laboratories
returned data. The initial data review indicated that
performance on residue level samples was much poorer than
anticipated, suggesting inadequate sample preparation and/or
instructions to collaborators. Three new residue level samples
were sent to participants as blind duplicates using the identical
procedure as was used for the original sample distribution (but
with revised LC standard solution concentrations). Fifteen
laboratories volunteered and all returned data, with the
majority of work performed in April–May 2006. Results for
the supplemental samples were much improved. The Study
Director believes the majority of parameters defined by the
Method Needs and Fitness for Purpose Document have been
met. The Study Director will submit the study report to
AOAC’s Manuscript Central and to Committee on Feeds, and
Fertilizers, and Related Agricultural Topics in the fall of 2006.
(7) Melengestrol Acetate in Feeds.—Topic Advisor Dawn
A. Merritt, Pharmacia Animal Health, MR 7926-300-409, 301
Henrietta St, Kalamazoo, MI 49007, Tel: 616-833-2382, Fax:
616-833-7721, E-mail: dawn.a.merritt@pfizer.com. There is
no activity to report.
(8) Monensin, Narasin, and Salinomycin, LC
Method.—Study Director Harold Campbell, Canadian Food
Inspection Agency, Ottawa Laboratory (Carling), Bldg 22,
Central Experimental Farm, 960 Carling Ave, Ottawa, ON

82B METHODS COMMITTEE REPORTS:JOURNAL OF AOAC INTERNATIONAL VOL. 90, NO. 1, 2007
K1A 0C6, Canada, Tel: 613-759-1227, Fax: 613-759-1260,
E-mail: hcampbell@inspection.gc.ca. The manuscript for the
joint ISO/AOAC collaborative study was reviewed, revised,
and accepted by AOAC INTERNATIONAL as First Action
2006.01 Analysis of Monensin, Narasin, and Salinomycin in
Premixes and Animal Feeds by Liquid Chromatography and
Post-Column Derivatization.
(9) Monensin, LC Method.—Method Advisor Mark R.
Coleman, Elanco Animal Health, A Division of Eli Lilly and
Co., 2001 W. Main St, Greenfield, IN 46140, Tel:
317-277-4613, Fax: 317-277-4167, E-mail:
Coleman_Mark_R@lilly.com. Method 997.04 Monensin in
Premix and Animal Feeds has Final Action status.
(10) Morantel Tartrate.—A Topic Advisor is required. An
LC method is desired; method published by Goras and
Gauthier [(1985) J. Assoc. Off. Anal. Chem. 68, 598–601] is a
good possibility.
(11) Narasin, LC Method.—Topic Advisor, Mark R.
Coleman.
(12) Nicarbazin.—The Topic Advisor position is vacant.
An interlaboratory study of an LC method was reported by de
Jong et al. [(2004) J. AOAC Int. 87, 1269–1277]. An LC
method reported by Krabel et al. [(2000) J. AOAC Int. 83,
1027–1037] is also a viable method.
(13) Oxytetracycline, LC Method.—Study Directors
Richard Larson and Nancy Thiex, Olson Biochemistry
Laboratories, South Dakota State University, SAS 133, Box
2170, Brookings, SD 57006, Tel: 605-688-6706, Fax:
605-688-6295, E-mail: Richard.Larson@sdstate.edu; Tel:
605-688-5466, Fax: 605-688-6295, E-mail:
Nancy.Thiex@sdstate.edu. A collaborative study based on the
method of Houglum, Larson, Mutchler, and Wetzler [(1998) J.
AOAC Int. 81, 919–922] was conducted to evaluate the
applicability, repeatability, and reproducibility in animal and
fish feeds, premixes, and animal remedies. The HPLC method
utilizes the extraction solution from AOAC Method 957.23
followed by separation on reversed-phase C18 column and
fluorescence detection. The mobile phase gradient runs from
15–35% methanol over 8 min with an initial 1 min hold time.
The aqueous component contains calcium chloride, disodium
EDTA, and sodium acetate buffered to pH 6.5. The presence
of chlortetracycline or other drugs does not interfere with the
analysis of oxytetracycline.
A set of 28 samples including 14 blind duplicates were
shipped to 17 laboratories. Study samples included animal
feeds, animal feed premixes and concentrates, mineral
premixes, and animal remedies. OTC levels ranged from a
few mg/kg to over 400 000 mg/kg. Also included in the
shipment were 4 familiarization samples with OTC levels
from 50 to 400 000 mg/kg. Collaborators were required to
obtain acceptable results on the familiarization samples and
meet system suitability requirements before proceeding to
analysis of the study samples. Results were returned from
10 laboratories. A report on the collaborative study was
presented at the 2006 AOAC Annual Meeting.
(14) Pyrantel Tartrate.—A Topic Advisor is required. An
LC method is desired.
(15) Roxarsone.—Topic Advisor Margaret Pomeroy,
Alpharma Inc., Animal Health Division, 400 State St, Chicago
Heights, IL 60411-1242, Tel: 708-758-0111, Fax:
708-757-2510, E-mail: peggy.pomeroy@alpharma.com.
AOAC Official Method 971.47 is the most commonly used
procedure for roxarsone (3-nitro-4-hydroxyphenyl arsonic
acid) in feeds. There was no activity on the development of an
LC method.
(16) Sulfamethazine, LC Post-Column Method.—Method
Advisor Kendrick Albert, Office of the Indiana State Chemist,
Purdue University, 1154 Biochemistry Bldg, West Lafayette,
IN 47907-1154, Tel: 765-496-3079, Fax: 765-494-4331,
E-mail: albertk@purdue.edu.
Method 999.16 Liquid Chromatographic–Post-Column
Derivatization has Final Action status. There is no
information to report on either suggested changes, or reported
problems or difficulties.
(17) Tilmicosin.—The Topic Advisor position is vacant.
The current method and interlaboratory study information is
published [(1997) J. AOAC Int. 80, 1156–1170].
(18) Tylosin, LC Method.—Topic Advisor Mark R.
Coleman. There is no activity to report.
(19) New Topics.—Study Directors are solicited for other
topics such as clopidol, diclazuril, fenbendazole,
halofuginone, levamisole, maduramicin,
ormetoprim/sulfadimethoxine, ractopamine, robenidine,
semduramicin, and tiamulin. Interested scientists or
organizations are encouraged to contact AOAC
INTERNATIONAL for more information.
(20) OMA Chapter 5, Section 5.1.02.—As part of the
revision of this chapter, the General Referee recommends a
revision of AOAC Official Method 950.02, Preparation of
Test Sample, to provide additional and current information
and to make it consistent with the same method in Section
4.1.02 of Chapter 4. The proposed wording is: Reduce particle
size of laboratory sample selecting a method, which
minimizes loss of moisture and maintains integrity of
constituents of analytical interest. For feeds containing
heat-sensitive analytes, grind to pass 2.0 mm sieve; for other
feeds grind to pass 1.0 mm sieve. Store the analytical sample
under conditions that minimize degradation of components
and exposure to the atmosphere.
Feeds, Vacant
(1) 2003.05 Crude Fat, Diethyl Ether Extraction, in
Feeds, Cereal Grains, and Forages by
Randall/Soxtec/Submersion Method.—Study Directors
Nancy Thiex and Bryan Gildemeister, E-mail:
bryan.gildemeister@sdstate.edu, Shirley Anderson, Foss
North America, 7682 Executive Dr, Eden Prairie, MN 55344,
Tel: 952-974-9892 ext. 161, Fax: 952-974-9823, E-mail:
sanderson@fossnorthamerica.com. Approved as First Action
Method. Method received for Final Action status in 2006.
Discontinue topic.
(2) 2003.06 Crude Fat, Hexanes Extraction, in Feeds,
Cereal Grains, and Forages by Randall/Soxtec/Submersion
Method.—Study Directors Nancy Thiex, Bryan Gildemeister,

Shirley Anderson. Approved as First Action Method. Method
received for Final Action status in 2006. Discontinue topic.
(3) Inorganic Elemental Constituents of Plant Samples,
Microwave Digestion.—Topic Advisor Robert Miller,
Colorado State University, Fort Collins, CO, Tel:
970-493-4382, Fax: 970-416-5820, E-mail:
rmiller@lamar.colostate.edu and Nancy Thiex. No activity
during the past year. Investigate applicability to feed sample
matrixes. Continue topic.
(4) Microscopy.—Topic Advisor Mike Bucker, Division
of Consolidated Lab Services (DCLS), 1 N. 14th St, Rm 127,
Richmond, VA 23219, Tel: 804-225-4070, Fax:
804-796-7795, E-mail: mbucker@dgs.state.va.us. No activity
during the past year. Continue topic.
(5) Neutral Detergent Fiber, Acid Detergent Fiber, and
Lignin Using Filter Bag Technology.—Topic Advisor
Andrew Komarek, ANKOM Technology Corp., Fairport, NY
14450, Tel: 716-425-3940, Fax: 716-425-3941, E-mail:
akomarek@ankom.com. Continue topic.
(6) Vitamin A, LC Method.—Continue topic.
Fertilizer and Agricultural Liming Materials, Peter
Kane
The GR, Peter Kane, retired effective August 31, 2006. His
recommendation is that Bill Hall be appointed the new GR.
(1) 929.01 Sampling.—Study Director Peter Kane, Office
of the Indiana State Chemist, Purdue University,
Biochemistry Bldg, 175 S. University St, West Lafayette, IN
47907-2063, Tel: 765-494-1560, Fax: 765-494-4331, E-mail:
Kanep@purdue.edu. The Sampling of Fertilizer Bulk Bags
manuscript is essentially complete and will be submitted to
AOAC’s ScholarOne system shortly, with a recommendation
that the sampling procedure be approved First Action. (Note
that Doug Caine initiated this study 6–7 years ago, but died
before the manuscript could be written. The effort was then on
hold for a number of years while AOAC reworked its business
plan, but now is back on track with a high priority with the
Fertilizer Subcommittee of the Agricultural Materials
Community). Continue study.
(2) 983.02 Potassium, Flame Photometric
Detection.—Study Director Natalie Newlon, Office of the
Indiana State Chemist, Purdue University, Biochemistry Bldg,
175 S. University St, West Lafayette, IN 47907-2063, Tel:
765-494-1563, Fax: 765-494-4331, E-mail:
newlonn@purdue.edu.
(3) Controlled Release Nutrient Extraction.—Study
Director William Hall, The Mosaic Co., PO Box 2000, 3095
County Rd, 640 W, Mulberry, FL 33860-1100, Tel:
863-428-7161, Fax: 863-428-7398. E-mail:
bill.hall@mosaicco.com. Preliminary data was submitted to
the AAPFCO Slow Release Committee in 2004. Additionally,
a reference incubation method for testing products in a
biologically active soil system has been tested and is
complete. This allows correlation of the laboratory method to
data generated by an agronomic (reference) method.
Correlations of the 2 methods is high >90. The study
manuscript and method will be submitted to J. AOAC Int. and
METHODS COMMITTEE REPORTS:JOURNAL OF AOAC INTERNATIONAL VOL. 90, NO. 1, 2007 83B
was presented at the 2006 AOAC Annual Meeting. Continue
study.
(4) OMA-2004-Nov-023 Arsenic, Cadmium, Cobalt,
Chromium, Lead, Molybdenum, Nickel, and Selenium in
Fertilizer by Microwave Digestion and ICP-OES
Detection.—Study Directors Peter Kane and William Hall.
The collaborative study manuscript is in review by Committee
on Feeds, Fertilizers, and Related Agricultural Topics.
(5) 2003.14 Determination of Urea in Fertilizers by
LC.—Study Director Michael Hojjatie, Tessenderlo Kerley
Inc., 2480 Twin Buttes, Sahuarita, AZ 85629, Tel:
520-791-2940, Fax: 520-625-8091, E-mail:
mhojjatie@tkinet.com. No report. Continue study.
(6) 982.01 Boron in Fertilizers.—Study Director Wesley
Hsu, U.S. Borax Inc., 26877 Tourney Rd, Valencia, CA
91355-1847, Tel: 661-287-5400, Fax: 661-287-5495, E-mail:
wesley.hsu@borax.com. A single-laboratory validation
(SLV( was received documenting the need for a method
modification. The method modifications are as follows: (1)
Making an unambiguous statement that the sample is to be
ground and homogenized using AOAC 929.02. (2) Usinga
mechanical shaker set at approximately 500 rpm to shake the
sample for 20 min to ensure more consistent results. (3)
Reducing the test portion to 1.00 g to facilitate complete
extraction of boron. The modification was accepted and
Method 982.01 has been revised accordingly.
Nutrients in Soils, Charles Focht
(1) Available Potassium in Soils, Ammonium Acetate
Method.—Study Director Maurice Watson, Department of
Natural Resources, Ohio State University, Wooster, OH
44691-4096, Tel: 330-263-3755, E-mail: Watson.8@osu.edu.
Continue topic.
(2) Plant Available Zinc, Manganese, Iron, and Copper in
Soils, DTPA Method.—Study Director Donald Horneck,
Oregon State University Extension Service, Hermiston
Agricultural Research and Extension Center, PO Box 105,
Hermiston, OR 97838, Tel: 541-567-8321, Fax:
541-567-2240, E-mail: don.horneck@orst.edu. Continue
topic.
(3) Available Phosphorus in Soils, Bray P1
Method.—Study Director Bryan Hopkins University of
Idaho, 1776 Science Center Dr, Idaho Falls, ID 83402-1575,
Tel: 208-529-8376, E-mail:bhopkins@uidaho.edu. Continue
topic.
AOAC Soil Methods Validation Status
There are currently 3 pending collaborative study reports
in the area of nutrients in soils, as cited above. Study data for
Plant Available Zinc, Manganese, Iron, and Copper in Soils,
DTPA Method is being compiled and a study manuscript
cowritten by Study Director Don Horneck and Ed Hanlon,
Chair of the Soils Subcommittee of AOAC’s Task Force on
Agricultural Materials. Study Director Maurice Watson has
submitted the report on Available Potassium in Soils,
Ammonium Acetate Method to Hanlon and Charles Focht, GR
for Nutrients in Soils. Both reports are expected to be

84B METHODS COMMITTEE REPORTS:JOURNAL OF AOAC INTERNATIONAL VOL. 90, NO. 1, 2007
submitted to AOAC Manuscript Central for review by the
Methods Committee on Feeds, Fertilizers, and Related
Agricultural Topics. Committee S889 of the Soil Science
Society of America (SSSA) is responsible for proposing new
soil testing methods for official validation. This committee
has decided to wait until AOAC reviews the potassium and
the zinc, manganese, iron, and copper before recommending
any new validation initiatives. The committee is awaiting
submission of the Available Phosphorus in Soils study report
to conduct an initial review before submitting it to AOAC for
considerations.
Tobacco, Harold Burton
GR Harold Burton retired this year. The proposed GR is
Serban Moldoveanu, R.J. Reynolds Tobacco Co., 950
Reynolds Blvd, Winston-Salem, NC 27105, Tel:
336-741-7948, E-mail: moldovs@rjrt.com. Interest has been
expressed regarding the continuation of interaction between
AOAC and the tobacco scientific community. Within the last
2 years, a number of papers that could have been connected to
AOAC were published by analytical chemists from tobacco
industry in journals such as Beitaege zur Tabakforschung
International. To mention only 2 of them (both papers can be
viewed at www.beitraege-bit.de): (1) “A collaborative study
for determination of tobacco specific nitrosamines in tobacco”
by W.T. Morgan, J.B. Reece, C.H. Risner, C.B. Bennet, C.H.
Midgett, K.S. Johnson, H.R. Burton (2004) Beitr. Tabak.
Intern. 21, 192–203. (2) “Analysis of minor alkaloids in
tobacco: A collaborative study” by P. Chen, N. Qian, H.
Burton, S.C. Moldoveanu (2005) Beitr. Tabak. Intern. 21,
369–379.
With Burton's retirement, the interaction between the
tobacco chemists community and AOAC should not be
interrupted. An annual meeting of tobacco scientists (60th
TSRC) took place this year in Montreal, Canada (September
17–20, 2006). The TCRC also hosts a number of committees
including the Analytical Methods committee.
Veterinary Analytical Toxicology
GR position has been vacant for a couple of years. It needs
to be filled with a highly motivated methods standardization
“champion” who can recruit methods projects and facilitate
their progress through AOAC INTERNATIONAL. Merl
Raisbeck has volunteered to serve as “Acting GR” for the
immediate and to initiate an effort to survey the Veterinary
Analytical Toxicology Community for the most appropriate
person to perform this effort and to determine what methods
are potentially “in the track” toward AOAC validation. The
other members of the informal task force include Mike Carson
(NE), Dirk Holstege (CA), and Christina Wilson (IN).