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Disappointing Results: The following table shows results obtained on a Thermo Jarrell Ash IRIS Spectrometer for a zeolite material. The purpose of this analysis is mainly to determine Si/Al ratio data to find out more about the structure of the material. For this purpose, RSD's (relative standard deviations) as low as possible are desirable. Data was collected in three thirty second replicates each of the long wavelength region and the short wavelength region of the spectrum, over a total sample delivery time of three minutes. Data could not be normalized to the mass of the sample due to a problem with data collection (Time Domain Spectroscopy) on the IRIS. This has reportedly been fixed, see the Iris document on our home page. Also, some analytical lines saturated during sampling. Apparently this has been recently improved approximately 30x. The Argon lines had large RSD's as well. It is likely because gas flow through the PowderPump™ was not constant during this test, giving a shift in all emission intensities. This problem is solved with mass flow control.

TJA IRIS Zeolite
ElementAlAl_2 NaNa_2 SiSi_2 Si_3 BBaCa
Line 308.215(103) 396.152(85) 588.995(57) 589.592(57) 212.412(158) 251.612(134) 288.158(117) 249.773(135) 455.403(74) 317.933(106)
unitsppm ppm ppm ppm ppm ppm ppm ppm ppm ppm
Avg.2602 2473 ********5459 5773 4171 16530 2.182 *** 224.4
StdDev244 173
1107 904 801 2150 0.199
53.9
RSD%9.368 6.936
20.27 15.67 19.2 139.062
24.02
3 runs









zeolite









ElementCaCoCuFeKLiMg Mn NiP
Line 226.502(149) 228.616(147) 324.754(103) 259.940(130) 766.490(44) 670.784(50) 285.213(118) 257.610(131) 231.604(145) 177.499(189)
unitsppm ppm ppm ppm ppm ppm ppm ppm ppm ppm
Avg.0.3072 -0.0582 4.49 *** 1445 1.635 204.1 9.088 0.5772 6.827
StdDev0.0327 0.0343 0.112
117 0.241 17.3 1.584 0.3089 1.005
RSD%10.63 162 2.563
8.112 14.76 8.457 17.43 53.52 14.75











ElementPPbRbSnSrVZn


Line 185.943(181) 220.353(153 780.023(43) 189.993(177) 421.552(80) 232.402(115) 213.856(157)


unitsppm ppm ppm ppm ppm ppm ppm


Avg.5.669 1.029 0.2935 0.2857 *** 3.408 4.863


StdDev1.025 0.209 0.20.0527
0.637 1.003


RSD%20.33 20.33 71.14 18.44
18.7 20.63