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Milli q rg unit

Manufactured by Merck Group
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Sourced in United States

The Milli-Q RG unit is a laboratory water purification system manufactured by Merck Group. It is designed to produce high-quality ultrapure water for a wide range of laboratory applications.

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Lab products found in correlation

Isopropanol, by Merck Group (1 mentions) Acetonitrile, by Merck Group (1 mentions) Methanol, by Merck Group (1 mentions) Formic acid, by Merck Group (1 mentions) Dichloromethane, by Merck Group (1 mentions) Formic acid, by Scharlab (1 mentions) Methylone, by Cayman Chemical (1 mentions) Pentylone, by Cayman Chemical (1 mentions) 3h dopamine, by PerkinElmer (1 mentions) 3h 5 ht, by PerkinElmer (1 mentions) N ethylnorpentylone, by Cayman Chemical (1 mentions) 3h methyl 4 phenylpyridinium 3h mpp, by American Radiolabeled Chemicals (1 mentions) Mdma d5, by Cerilliant (1 mentions) Tert butyl methyl ether mtbe, by Merck Group (1 mentions) 3h norepinephrine, by American Radiolabeled Chemicals (1 mentions) Ammonium formate, by Merck Group (1 mentions) Ethyl acetate, by Merck Group (1 mentions)

Close spelling variants of this product

Milli-Q RG Milli-Q unit Milli-Q

5 protocols using milli q rg unit

1

Quantification of Polyphosphates using Ion Chromatography

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Sodium hexametaphosphate (65-70% P2O5 basis) was supplied by Merck KGaA (Darmstadt, Germany), and carbonate-free sodium hydroxide (50%, w/w) was purchased from Fisher Scientific Italia (Rodano, Milan, Italy). All solutions were prepared by using ultrapure water with a specific resistance of 18.2 MΩ-cm, produced by a Milli-Q RG unit, Millipore (Bedford, MA, USA). The solutions used as mobile phase, composed of different concentrations of sodium hydroxide, were filtered using 0.45-μm membranes and degassed with nitrogen. The standard solutions of PPs were prepared from the 1000 mg L-1 stock solution, diluting with ultrapure water to obtain the following concentrations: 12.5, 25, 50, 100 and 200 mg L-1.
Berardi G., Di Taranto A., Haouet N., Vita V., Palomba E., Rizzi G, & Iammarino M. (2023). Monitoring of polyphosphate levels in animal source products collected in Italy by means of ion chromatography with suppressed conductivity detection. Italian Journal of Food Safety, 12(4), 11110.
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2

Quantitative Analysis of LSD in Oral Fluid

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The LSD, OH-LSD and LSD-d 3 (internal standard, IS) standards were purchased from Cerilliant (Round Rock, TX, USA); isopropanol, dichloromethane, methanol, acetonitrile and formic acid (98-100%) from Merck (Darmstadt, Germany); sodium tetraborate from LS Chemicals (Ribeirao Preto, SP, Brazil). Ultrapure deionized water was supplied by a Milli-Q RG unit from Millipore (Billerica, MA, USA). Helix pomatia β-glucuronidase (Type HP-2, ≥ 100.000 units/mL) was purchased from Sigma-Aldrich (St. Louis, MO, USA). All solvents employed in the extraction were of HPLC grade. Quantisal™ oral fluid collection devices and its extraction buffer (phosphate buffer solution: PBS, 100 mmol/L) were purchased from Immunalysis (Pomona, CA, USA).
da Cunha K.F., Kahl J.M.M., Fiorentin T.R., Oliveira K.D, & Costa J.L. (2022). High-sensitivity method for the determination of LSD and 2-oxo-3-hydroxy-LSD in oral fluid by liquid chromatography‒tandem mass spectrometry. Forensic toxicology, 40(2).
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3

Quantitative Analysis of N-Ethylnorpentylone

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N-Ethylnorpentylone reference material was purchased from Cayman Chemical (Ann Arbor, MI, USA) and MDMA-d5, used as internal standard (IS), was purchased from Cerilliant (Round Rock, TX, USA). Methanol and formic acid (98-100%) were purchased from Scharlau (Barcelona, Spain). Ammonium formate and tert-butyl methyl ether (MTBE) were purchased from Sigma-Aldrich (St Louis, MO, USA) and sodium tetraborate from LS Chemicals (Ribeirao Preto, SP, Brazil). Ultrapure deionized water was purified by a Milli-Q RG unit from Millipore (Billerica, MA, USA). All solvents employed in the sample extractions were HPLC grade. N-Ethylnorpentylone, pentylone and methylone used for monoamine transporter assays were obtained from Cayman Chemical. [3H]Norepinephrine (60 Ci/mmol) and [3H]methyl-4-phenylpyridinium ([3H]MPP+; 80 Ci/mmol) were purchased from American Radiolabeled Chemicals (St. Louis, MO, USA) while [3H]dopamine (28 Ci/mmol) and [3H]5-HT (38 Ci/mmol) were purchased from Perkin Elmer (Billerica, MA, USA). All other reagents used for monoamine transporter assays were obtained from Sigma-Aldrich unless otherwise indicated.
Costa J.L., Cunha K.F., Lanaro R., Cunha R.L., Walther D, & Baumann M.H. (2018). Analytical quantification, intoxication case series, and pharmacological mechanism of action for N-ethylnorpentylone (N-ethylpentylone or ephylone). Drug testing and analysis, 11(3), 461-471.
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4

Purification and Synthesis of Peptides

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The monomer of ortho-aminophenol, oAP, (Fluka, purity 99%, FW = 109.13 g/mol) was purified, before being used, by recrystallization in ethyl acetate (Sigma Aldrich, purity 99%, d = 0.9 g/mL, bp = 76.5 °C) and with activated carbon, as suggested by Ortega [47] . Monomer oAP solutions were prepared in supporting electrolyte just before their use. The procedures for the synthesis of unprotected VGGVG and Boc-VGGVG-OEt pentapeptides and for the pentadecapeptide (VGGVG) 3 are reported in details in previous studies [34] [35] [36] 48] . Pure water supplied by Milli-Q RG unit from Millipore (Bedford, MA, USA) was used throughout. All other chemicals were of analytical grade and were used without further purification.
Carbone M.E., Ciriello R., Moscarelli P., Boraldi F., Bianco G., Guerrieri A., Bochicchio B., Pepe A., Quaglino D, & Salvi A.M. (2018). Interactions between elastin-like peptides and an insulating poly(ortho-aminophenol) membrane investigated by AFM and XPS. Analytical and bioanalytical chemistry, 410(20).
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5

Certified Standards for Ion Chromatography

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Certified reference material (CRM) of NO3 -and NO2 -standard solutions for ion chromatography (1000 mg/L) were purchased from Sigma-Aldrich (Stenheim, Germany). Ultrapure water supplied by a Milli-Q RG unit from Millipore (Bedford, MA, USA) with a specific resistance of 18.2 MΩ cm -1 , was used to prepare all standard solutions, mobile phases and for sample preparation. Working solutions were prepared by dilution CMR in ultrapure Milli-Q water to get the required concentrations.
Chiesa L., Arioli F., Pavlovic R., Villa R, & Panseri S. (2019). Detection of nitrate and nitrite in different seafood. Food chemistry, 288.
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