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New Standards for Isotope Dilution Analysis

New Standards for Isotope Dilution Analysis

Isotope dilution analysis (IDA) or isotope dilution
mass spectrometry (ID-MS) is a well-known analytical
technique based on the measurement of isotope
ratios in samples where the isotopic composition has
been altered by the addition of a known amount of
an isotopically enriched element. It is an absolute
quantitative method (traceable to the primary isotopic
standard) and is commonly used for applications
where high accuracy and certainty is required, for
example in National Metrology Institutes. Also, since
the quantification solely depends on the measurement
of the isotope ratio in the sample itself and does
not involve the use of external calibration, IDA is
significantly less prone to matrix effects. IDA offers
the possibility to determine major to ultra-trace
concentrations of elements in virtually any matrix, with
superior accuracy and precision compared to external
calibration and is often used as a reference method for
certified reference material characterisation.

 

Click here for product listings

Posted: Wed 26th Mar 2014
New Brisa "LC2" HPLC Column

New Brisa "LC2" HPLC Column

Optimise your analysis costs with the NEW Brisa LC2 reverse phase C18 columns.

R&D Performance - QC Low Cost

Brisa LC2 columns utilise the latest technology ultrapure silica with advance stationary phase chemistry to
deliver a class-leading performance at a market-leading price. They feature:

  • Ultrapure spherical silica
  • Free of trace metals
  • Totally endcapped C18 stationary phase
  • Wide pH range (pH 2 - 11)
  • Choice of 3 and 5μm particle size
  • Standard analytical and LC-MS column dimensions
  • Manufactured by a leading European separations company

Brisa LC2 column geometries are optimised for both regular analytical work for standard separations and
for use with LC-MS for fast separations.  All columns are individually tested for mechanical stability,
reproducibilty and performance.

Validate your reverse phase C18 column HPLC method with Brisa LC2 and see the cost savings to be made.

 

Click here to browse the range of columns

Posted: Tue 4th Mar 2014
New Stable Isotopes - March 2014

New Stable Isotopes - March 2014

D-7654

N-Acetyl-d3-5-hydroxytryptamine
(N-Acetylserotonin; Normelatonin)

MW 221.27
unlabelled CAS [1210-83-9]
D-7678

N-Acetyl-L-methionine-d3 (S-methyl-d3)
(97% enantiomeric purity)

MW 194.26
unlabelled CAS [65-82-7]

 CD3SCH2CH2CH(NHCOCH3)COOH
D-7699

Bis(3-methylbutyl) Phthalate-3,4,5,6-d4
(Di-iso-pentyl Phthalate)

MW 310.43
CAS [1346597-80-5] unlabelled CAS [605-50-5]

  C6D4[COOCH2CH2CH(CH3)2]2
D-7668

Bis(6-methylheptyl) Phthalate-3,4,5,6-d4
(Di-iso-octyl Phthalate)

MW 394.59

  C6D4[COO(CH2)5CH(CH3)2]2
D-7669

Bis(5-methylhexyl) Phthalate-3,4,5,6-d4
(Di-iso-heptyl Phthalate)

MW 366.53
unlabelled CAS [41451-28-98]

 C6D4[COO(CH2)4CH(CH3)2]2
D-7697

4-tert-Butylbenzoic-d13 Acid

MW 191.31
unlabelled CAS [98-73-7]

 (CD3)3CC6D4COOH
D-7708

Chlormequat-d9 Chloride (N,N,N-trimethyl-d9)
(2-chloroethyl)trimethylammonium Chloride]

MW 167.13
CAS [1219257-11-0] unlabelled CAS [999-81-5]

 ClCH2CH2N(CD3)3Cl
D-7706

Creatine-d5 H2O (N-methyl-d3; glycine-2,2-d2)

MW 154.18
unlabelled CAS [6020-87-7]

  HOOCCD2N(CD3)C(=NH)NH2·H2O
D-7707

Creatinine-d5 (N-methyl-d3; imidazolidinone-5,5-d2)

MW 118.15
unlabelled CAS [60-27-5]

  
D-7674

(±)-O-Desmethylnaproxen-d3 (a-methyl-d3)

MW 219.25
CAS [1122399-99-8]  unlabelled CAS [60756-73-2]

  
D-7700

Di-n-dodecyl Phthalate-3,4,5,6-d4

MW 506.80
unlabelled CAS [2432-90-8]


 C6D4[COO(CH2)11CH3]2
D-7695

Diethyl-d10 Carbonate

MW 128.19
unlabelled CAS [105-58-8]

  (CD3CD2O)2CO
D-7687

5,6-Dihydrothymine-a,a,a,5,6,6-d6

CAS [334473-42-6]
MW 134.17
unlabelled CAS [696-04-8]

  
D-7688

 5,6-Dihydrouracil-5,5,6,6-d4

MW 118.13
CAS [334473-41-5] unlabelled CAS [504-07-4]

  
D-7484

 3,5-Dimethoxy-d6-4-hydroxybenzoic Acid
(Syringic Acid)

CAS [84759-06-8]  MW 204.21
unlabelled CAS [530-57-4]

  
D-7667

Di-n-undecyl Phthalate-3,4,5,6-d4

MW 478.75
unlabelled CAS [3648-20-2]

  C6D4[COO(CH2)10CH3]2
D-7673

Ethyl (±)-2-Methylbutyrate-d9

MW 139.24
unlabelled CAS  [7452-79-1]

  CD3CD2CD(CD3)COOCH2CH3
D-7680

Hexafluorobisphenol-A-3,3’,5,5’-d4
[4,4’-(Hexafluoroisopropylidene)diphenol]

MW 340.26
unlabelled CAS [1478-61-1]

  
D-7481

4-Hydroxybenzaldehyde-a,2,3,5,6-d5

MW 127.15
CAS [298704-22-0]  unlabelled CAS [123-08-0]

  HOC6D4CDO
D-7482

trans-4-Hydroxycinnamic-a,b,2,3,5,6-d­6 Acid
(p- Coumaric Acid)

MW 170.20
unlabelled CAS [501-98-4]

  HOC6D4CD=CDCOOH
D-7485

4-Hydroxy-3-methoxy-d3-benzoic Acid
(Vanillic Acid)

MW 171.17
unlabelled CAS [121-34-6]

  HOC6H3(OCD3)COOH
D-7571

Levetiracetam-d6 (2,3,3,4,4,4-butyramide-d6)
[2(S)-(2-Oxopyrrolidin-1-yl)butyramide]

MW 176.25
unlabelled CAS [102767-28-2]

  
D-6622

(±)-2-Methyl-d3-piperazine-2,3,3,5,5,6,6-d7

MW 110.22
unlabelled CAS [109-07-9]

  
D-7685

3-(Methylthio)propionaldehyde-2,2-d2
(Methional)

MW 106.18
unlabelled CAS [3268-49-3]

  CH3SCH2CD2CHO
D-7692

Metoxuron-d6 (N,N-dimethyl-d6)

MW 234.71
unlabelled CAS [19937-59-8]

  
D-7705

mono-n-Dodecyl Phthalate-3,4,5,6-d4

MW 338.48
unlabelled CAS [21577-80-0]

  HOOCC6D4COO(CH2)11CH3
D-7701

mono-(3-Methylbutyl) Phthalate-3,4,5,6-d4
mono-iso-Pentyl Phthalate)

MW 240.29

  HOOCC6D4COOCH2CH2CH(CH3)2
D-7703

mono-(6-Methylheptyl) Phthalate-3,4,5,6-d4
(mono-iso-Octyl Phthalate)

MW 282.37
unlabelled CAS [30849-48-0]

  HOOCC6D4COO(CH2)5CH(CH3)2
 D-7702

mono-(5-Methylhexyl) Phthalate-3,4,5,6-d4
(mono-iso-Heptyl Phthalate)

MW 268.35
unlabelled CAS [92135-04-1]

 HOOCC6D4COO(CH2)4CH(CH3)2
D-7704

mono-n-Undecyl Phthalate-3,4,5,6-d4

MW 324.45
unlabelled CAS [51622-03-8]

  HOOCC6D4COO(CH2)10CH3
 D-7682

(±)-Myclobutanil-d9 (butyl-d9)

MW 297.83
unlabelled CAS [88671-89-0]

  
 D-7689

2-Nitrotoluene-d7

CAS [84344-04-7]  MW 144.18
unlabelled CAS [88-72-2]

  CD3C6D4NO2
D-7690

4-Nitrotoluene-d7

CAS [84344-19-4]  MW 144.18
unlabelled CAS [99-99-0]

 CD3C6D4NO2
D-7681

(±)-Penconazole-d7 (pentyl-3,3,4,4,5,5,5-d7)

MW 291.23
unlabelled CAS [66246-88-6]

  
D-7614

Phentermine-d5 HCl (phenyl-d5)

CAS [1330236-21-9]  MW 190.73
unlabelled CAS [1197-21-3]

  
D-7677

D-Phenyl-d5-alanine-N-FMOC
(> 98% enantiomeric purity)

MW 392.46
unlabelled CAS [86123-10-6]

 C6D5CH2CH(NH-FMOC)COOH
 D-0615

Propane-2-d1 (gas)

CAS [20717-74-2]  MW 45.10
unlabelled CAS [74-98-6]

  CH3CHDCH3
 D-7623

Propantheline-d3 Bromide (N-methyl-d3)

CAS [64717-35-7]  MW 451.42
unlabelled CAS [50-34-0]

  
D-7694

Pyridaben-d13
(4-tert-butyl-d9-benzyl-2,3,5,6-d4)

MW 378.01
unlabelled CAS [96489-71-3]

  
 D-7693

(±)-Pyriproxyfen-d4 (pyridyl-d4)

MW 325.40
unlabelled CAS [95737-68-1]

  
D-7655

Sodium L-3-Phenyl-d5-lactate

MW 193.19
unlabelled CAS [57618-25-4]

 C6D5CH2CH(OH)COONa
D-7656

Sodium Phenyl-d5-pyruvate

MW 191.17
unlabelled CAS [114-76-1]

 C6D5CH2COCOONa
D-7563

(±)-Tebuconazole-d4 (4-chlorophenyl-d4)

MW 311.85
unlabelled CAS [107534-96-3]

  
D-7315

Thiabendazole-d4 (benzimidazole-4,5,6,7-d4)

CAS [1190007-20-5]  MW 205.27
unlabelled CAS [148-79-8]

  
D-7683

(±)-Triadimefon-d4 (4-chlorophenoxy-d4)

MW 297.78
unlabelled CAS [43121-43-3]

  
D-7684

Triadimenol-d4 (4-chlorophenoxy-d4)
(mixture of stereoisomers)

MW 299.79
unlabelled CAS [55219-65-3]

  
 D-7666

Valacyclovir-d8 HCl (L-valine-d8)

CAS [1279033-32-7]  MW 368.85
unlabelled CAS [124832-27-5]

  
Posted: Tue 4th Mar 2014

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