Environmental Analysis
New Brochure «Metrohm Inline Sample Preparation (MISP)»
Metrohm Inline Sample Preparation
Trace-level Determination of Perfluorinated Compounds in Water using Ion Chromatography
The human and environmental exposure potential of perfluorinated alkyl substances such as perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) has become the subject of intense research. Metrohm presents an easy-to-use and affordable direct-injection method for PFOA and PFOS determination in drinking water.
The currently used method for the determination of anionic perfluorinated surfactants is LC-MS/MS. The analytical methods for the determination of PFOS and PFOA in water samples generally employ a C18-SPE column, either with or without ion pairing or acidification, followed by LC-MS/MS. However, this method suffers from relatively high running and investment costs.
The new Metrohm method is a good alternative regarding both investment on instrumentation and usability. The method is based on suppressed ion chromatography with isocratic elution on a reversed-phase column thermostated at 35°C using an aqueous mobile phase containing boric acid and acetonitrile. The used detection technique is conductivity.
While PFOA and PFOS determination in low salt-containing water samples can be performed using straightforward direct injection chromatography, samples with higher alkaline-earth-metal concentration, e.g. tap, lake, sludge or river water samples, should pass over a cation exchanger such as Metrohm’s Sample Preparation Module «SPM» prior to separation.
Reader Reply Card no 23 Ion chromatography – analyses could not be easier
9
Metrohm Inline Sample Preparation (MISP) puts an end to manual sample preparation in ion chromatography. MISP stands for methods developed by Metrohm that allow users to fully automate the inline preparation of difficult samples. They benefit from substantial savings in time and money while improving the accuracy of their analyses. The new brochure «Metrohm Inline Sample Preparation» can be downloaded free of charge from
misp.metrohm.com.
Metrohm Inline Ultrafiltration reliably removes particles from the sample. As a result the analytical column is protected from contamination and its lifetime considerably increased.
Metrohm Inline Dialysis is another technique effectively removing particles, oil drops and colloids from the sample to be analysed. Emulsions, samples containing fats and proteins, body fluids and strongly polluted wastewater can be reliably determined without damaging the column.
Metrohm Inline Dilution provides for auto- matic dilution of the sample depending on the predefined concentration limits. Even the dilution factor is determined automatically making sure that results lie always within the calibration range and thus are correct.
Metrohm Inline Matrix Elimination allows the matrix to be removed automatically without requiring the use of cartridges. Ion analysis in organic solvents is one of the applications.
Metrohm Inline Preconcentration uses a preconcentration column and is ideally suited for trace analysis down to the ng/L concentration range.
Metrohm Inline Calibration allows to calibrate any standard concentration in the ppt range by using a single standard solution at the ppb level.
Metrohm Inline Neutralization adjusts the pH of samples in order to prevent interferences with the analysis of anions. When combined with Inline Preconcentration, Inline Neutralization makes trace anion analysis possible.
Reader Reply Card no 25 Reader Reply Card no 24
Don't be afraid of dirty jobs Metrohm – the tougher IC system
Loaded with particles? Presence of proteins? Filtration impossible? Metrohm Inline Sample Preparation (MISP) is the solution. Your Metrohm IC system gets the job done. Always! Metrohm IC – built for heavy duty, built to last.
www.professional-ic.com
Annual Buyers Guide 2010
IET
Ecknauer+Schoch ASW
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136 |
Page 137 |
Page 138 |
Page 139 |
Page 140 |
Page 141 |
Page 142 |
Page 143 |
Page 144 |
Page 145 |
Page 146 |
Page 147 |
Page 148
