You searched for: Organic Standards

Supplier: Merck

The tricyclazole CRM may also find the following uses: Determination of tricyclazole content in paddy rice using sliver colloid as a substrate and pyridine as an internal standard by surface-enhanced Raman spectroscopy (SERS). To detect residues of tricyclazole and thiram in pear fruit extracts using SERS. Dissipation studies of penoxsulam tricyclazole and profoxydim in rice paddy systems using HPLC-Diode Array Detection (DAD). Determination of tricyclazole residues in rice using liquid chromatography-tandem mass spectrometry (LC-MS/MS) along with the QuEChERS method of sample preparation. Degradation of tricyclazole (TC) in an aqueous solution and real pesticide industry wastewater (RPW) by electron beam (EB) radiation.

Supplier: Merck

Ethirimol is the ethylamino isomer of dimethirimol that belongs to a group of pyrimidine fungicides. This systemic fungicide acts by inhibiting nucleic acid synthesis and is used as a seed treatment to control powdery mildew in spring barley and wheat. Ethirimol is not approved for use in European Union (EU) as per Regulation (EC) No 1107/2009. But a default maximum residue level (MRLs) from 0,01 to 2 mg/kg is applied for products of plant and animal origin according to Regulation (EU) 2021/1531. Ethirimol has to be monitored in the Multiannual Control Programme for Pesticides Residues (MACP) run within the EU and EFTA in/on products of plant origin.

Supplier: Merck

Sethoxydim is a selective systemic and cyclohexanedione oxime herbicide absorbed mainly by foliage and to a lesser extent by roots. It is an acetyl CoA carboxylase (ACCase) inhibitor which inhibits the incorporation of acetate into fatty acids and interferes with the formation of phospholipids used in building new membranes. It is used to control annual and perennial grass weeds (except Poa spp.) in broad-leaved crops including cotton oilseed rape soybeans sugar beets fodder beets sunflowers spinach potatoes tobacco peanuts strawberries alfalfa flax and vegetables. Sethoxydim is not approved for use in the European Union (EU) as a plant protection agent following Regulation (EC) No. 1107/2009 and repealing Directive 91/414/EEC. But maximum residue levels of 0,05 to 10 mg/kg are allowed for the presence of sethoxydim expressed as a sum of sethoxydim and clethodim including their degradation products in products of plant and animal origin according to the EU Reg. No 839/2008.

Supplier: Merck

Fenpropimorph is a systematic fungicide that belongs to the morpholine group of sterol biosynthesis inhibitors. It is widely applied in cereals to control pathogens such as Erysiphe graminis (powdery mildew) and Puccinia recondita (cereal rust). Fenpropimorph inhibits fungal; 8 to 7 isomerase and 14 reductase enzymes involved in the ergosterol biosynthesis. Fenpropimorph is not approved for use in European Union (EU) as per Regulation (EC) No 1107/2009. The maximum residue level (MRLs) for fenpropimorph (sum of isomers) following Reg. (EU) 2019/552 has been set from 0,01 to 3 mg/kg for products of plant and animal origin. Fenpropimorph has to be monitored in the Multiannual Control Programme for Pesticides Residues (MACP) run within the EU and EFTA in/on products of plant origin.

Supplier: Merck

Prothiofos is a non-systemic insecticide and belongs to the group of organophosphates. It is an acetylcholinesterase (AChE) inhibitor causing hyperexcitation and impedes the functioning of the nervous system. Prothiofos gets activated by contact and ingestion and is used to control caterpillars Pseudococcus spp. thrips cockchafer larvae cutworms etc. in vegetables fruit maize sugar cane sugar beets tea tobacco and ornamentals. According to the Commission Implementing Regulation (EU) No 2076/2002 of 20th November 2002 prothiofos is not approved for use in the European Union (EU) as a plant protection agent following Regulation (EC) No. 1107/2009. But a default maximum residue limit of 0,01 mg/kg is applicable for the presence of prothiofos in products of plant and animal origin according to Art 18(1)(b) Reg 396/2005.

Supplier: Merck

Profenofos CRM may also be used as given below: Evaluation of 250 pesticide residues extracted by QuEChERS method from 103 processed fruit samples using ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS. Gas chromatography-tandem mass spectrometry (GC-MS/MS) based analysis of 213 pesticide residues in soybean after their extraction by QuEChERS procedure. Detection of 252 pesticides extracted from surface water samples by solid-phase extraction (SPE) using liquid chromatography quadrupole-orbitrap high-resolution tandem mass spectrometry. Multi-residue analysis of 160 multiclass pesticides using ethyl acetate (EtAC)/n. hexane mixture for extraction from chamomile thyme and marjoram samples and their analysis by gas chromatography-tandem mass spectrometry (GC-MS/MS). Simultaneous determination of 34 pesticides in various environmental water samples by dispersive liquid-liquid microextraction (DLLME) technique in combination with gas chromatography-mass spectrometry(GC-MS/MS). Quantitation of 40 multi-class insecticides and fungicides in 81 apple samples by using gas- and liquid- chromatography-mass following a QuEChERS-based extraction.

Supplier: Merck

Mepiquat chloride is a synthetic plant growth regulator that is absorbed by the foliage and translocated throughout the plant. It is widely used to manipulate plant structure and helps to combat excessive vegetative growth which if left uncontrolled can lead to undesirable fruit shed boll rot and yield reductions. Mepiquat chloride inhibits gibberellic acid synthesis thus reducing cell enlargement and cell division rate. Application of mepiquat chloride in cotton results in a more compact plant caused by shortened internode elongation reduced main stem nodes and decreased leaf expansion and leaf area. Mepiquat chloride is approved for use in European Union (EU) following Regulation (EC) No 1107/2009 (repealing Directive 91/414/EEC). The maximum residue level (MRL) for Mepiquat (sum of mepiquat and its salts expressed as mepiquat chloride) is established from 0,02 to 4 mg/kg for many plant-based products and 40 mg/kg for linseed mustard sunflower and poppy seeds. For products of animal origin the MRL is set from 0,05 to 0,8 mg/kg as per Reg. (EU) 2021/976. Mepiquat has to be monitored in the Multiannual Control Programme for Pesticides Residues (MACP) run within the EU and EFTA in/on products of plant origin.

Supplier: Merck

Tebutam CRM may also be used as given below:
Optimisation of sample extraction based on QuEChERS and dispersive-solid-phase extraction (d-SPE) clean-up for the multi-residue analysis of 120 pesticides 16 polycyclic aromatic hydrocarbons and 22 polychlorinated biphenyls by liquid and gas chromatography coupled with tandem mass spectrometry (MS/MS)
Evaluation of 250 pesticide residues extracted by QuEChERS method from 103 processed fruit samples using ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS)
Determination of 90 pesticides 16 polycyclic aromatic hydrocarbons and 22 polychlorinated biphenyls in honey samples by using QuEChERS combined with dispersive solid-phase extraction (SPME) for sample pre-treatment and liquid chromatography-triple-quadrupole tandem mass spectrometry and gas chromatography-ion-trap tandem mass spectrometry for quantitation
Screening and quantification of 569 pesticides in honeysuckle samples by a combination of ultrahigh-performance liquid chromatography (UHPLC) and quadrupole-Orbitrap high-resolution mass spectrometry
Simultaneous determination of 134 pesticide residues in tea samples using d-SPE extraction with a multi-functional filter (MFF) followed by ultra-high performance liquid chromatography (UPLC) and quadrupole time-of-flight mass spectrometry (TOF-MS).

Supplier: Merck

Simazine CRM may also be used as given below: Development and validation of an ultrasonic-assisted dispersive liquid-liquid microextraction (UA-DLLME) method for sample extraction followed by gas chromatography-mass spectrometry based determination of endocrine-disrupting herbicides in the river and seawater samples. Determination of triazine pesticide residues in samples of apples pears carrots potatoes tomatoes avocado cucumber spinach bananas and oranges by modified QuEChERS and solid-phase extraction (SPE) procedures followed by liquid chromatography-photodiode array (LC-DAD) analysis. Multi-residue analysis of 67 pesticides in olive oil olives and avocado samples by liquid chromatography-tandem mass spectrometry (LC-MS/MS) to evaluate various clean-up sorbents. Quantitation of 20 pesticides in eel and shrimp samples by a scheduled multiple reaction monitoring (sMRM) method and QuEChERS with EDTA for sample extraction and purification. Analysis of 35 micropollutants including pesticides in water samples by liquid chromatography-tandem mass spectrometry (LC-MS/MS) after their solid-phase extraction. Simultaneous quantification of 58 pharmaceuticals and personal care products (PPCPs) and pesticides in water samples by solvent-based de-emulsification dispersive liquid-liquid microextraction (SD-DLLME) combined with liquid chromatography-tandem mass spectrometry (LCMS/MS).

Supplier: Merck

Monolinuron CRM may also be used as given below: Determination of 252 pesticides extracted from surface water samples by solid-phase extraction (SPE) using liquid chromatography quadrupole-orbitrap high-resolution tandem mass spectrometry. Extraction of 13 pesticides from four groundwater and three river water samples using silica-based MSU-1 mesoporous solid as a sorbent for their solid-phase extraction (SPE) followed by ultra-performance liquid chromatography-triple quadrupole-mass spectrometric (UHPLC- QqQ-MS/MS) determination. Development and validation of a UHPLC-diode array detection (DAD) method for simultaneous determination of urea and tebuthiuron herbicides in four fresh vegetable samples. Multi-residue analysis of 50 herbicides in 51 grain samples of soybean corn and wheat by ultra-performance liquid chromatography-electrospray ionisation-mass spectrometry (UPLC-ESI-MS). Extraction of 109 pesticide residues from different chemical classes from 345 tomato samples by modified QuEChERS method and their determination using liquid chromatography-tandem mass spectrometry (LC-MS/MS). Simultaneous analysis of 238 pesticides and 78 veterinary drugs in 80 bovine milk samples using ultra-fast liquid chromatography-tandem mass spectrometry (UFLC-MS/MS) and gas chromatography-tandem mass spectrometry (GC-MS/MS).